1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
#define READ_NUM_TEST_CASES  false
#define USE_FAST_IO          false

////////////////////////////////////////////////////////////////////////////////
// AMALGAMATE: "include/template.hpp" BEGINS HERE
//
	
	
	#include <bits/stdc++.h>
	using namespace std;
	
	
	////////////////////////////////////////////////////////////////////////////////
	// AMALGAMATE: "include/abbrevs.hpp" BEGINS HERE
	//
		
		#define UI unsigned int
		
		#define LL long long
		#define ULL unsigned long long
		
		#define PII pair<int,int>
		
		
		#define RI ri()
		#define RUI rui()
		
		#define RLL rll()
		#define RULL rull()
		
		#define RSTR rstr()
		
		
		
		#define FO(i,a,b) for(int i=(a); i<int(b); ++i)
		#define OF(i,a,b) for(int i=(b)-1; i>=int(a); --i)
		
		#define FOR(i,n) FO(i,0,n)
		#define ROF(i,n) OF(i,0,n)
		
		
		#define MIN(a,b) ((a)<(b) ? (a) : (b))
		#define MAX(a,b) ((b)<(a) ? (a) : (b))
		
		#define REMIN(a,b) ((a) = min(a,b))
		#define REMAX(a,b) ((a) = max(a,b))
		
		#define ALL(c) (c).begin(),(c).end()
		
		#define SQR(x) ((x)*(x))
		
		
		
		bool is_pow(int x) {
			return (x&(x-1)) == 0;
		}
		
	
	//
	// AMALGAMATE: "include/abbrevs.hpp" ENDS HERE
	////////////////////////////////////////////////////////////////////////////////
	
	
	#if USE_FAST_IO
		
		////////////////////////////////////////////////////////////////////////////////
		// AMALGAMATE: "include/fast-io.hpp" BEGINS HERE
		//
			
			
			//#define FREAD  fread
			//#define FWRITE fwrite
			
			#define FREAD  fread_unlocked
			#define FWRITE fwrite_unlocked
			
			
			
			
			
			
			struct Buffer {
				FILE* const stream;
				const int buffer_size;
			
				uint8_t* const buff;
				int pos = 0;
			
				Buffer(FILE* a_stream, int a_buffer_size) :
						stream( a_stream ),
						buffer_size( a_buffer_size ),
						buff( new uint8_t[ buffer_size ] ) {
					setvbuf(stream, NULL, _IONBF, 0);
				}
			
				~Buffer() {
					delete[] buff;
				}
			};
			
			
			
			
			
			
			
			
			
			
			class In_Buffer : private Buffer {
			public:
				In_Buffer(FILE* a_stream, int a_buffer_size) : Buffer(a_stream, a_buffer_size) {
					FREAD(buff, 1, buffer_size, stream);
				}
			
			public:
				void prepare(int num_chars) {
					auto remaining = buffer_size - pos;
					if(remaining >= num_chars) return;
			
					assert(remaining >= 0); // prevent compiler warning
					memcpy(buff, buff+pos, remaining);
			
					int read = FREAD(buff+remaining, 1, pos, stream);
					int block_end = remaining + read;
					memset(buff + block_end, 0, buffer_size - block_end);
					pos = 0;
				}
			
			public:
				char get_unchecked() {
					return buff[ pos++ ];
				}
			};
			
			
			template<class INT>
			INT read_unsigned(In_Buffer& buff) {
				buff.prepare(25);
			
				char c = buff.get_unchecked();
				while(c < '-') c = buff.get_unchecked();
			
				INT r = 0;
			
				for(;;) {
					if(c < '0') return r;
					c -= '0';
					r = r*10 + c;
					c = buff.get_unchecked();
				}
			}
			
			
			template<class INT>
			INT read_signed(In_Buffer& buff) {
				buff.prepare(25);
			
				char c = buff.get_unchecked();
				while(c < '-') c = buff.get_unchecked();
			
				bool minus = false;
				if(c=='-') {
					c = buff.get_unchecked();
					minus = true;
				}
			
				INT r = 0;
			
				for(;;)
				{
					if(c < '0') return minus ? -r : r;
					r = r*10 + (c-'0');
					c = buff.get_unchecked();
				}
			}
			
			
			
			
			In_Buffer& operator>>( In_Buffer& buff, char& c) {
				buff.prepare(1);
				c = buff.get_unchecked();
				return buff;
			}
			
			
			
			In_Buffer& operator>>( In_Buffer& buff, UI& r) { r = read_unsigned<UI>(buff); return buff; }
			In_Buffer& operator>>( In_Buffer& buff, ULL& r) { r = read_unsigned<ULL>(buff); return buff; }
			
			In_Buffer& operator>>( In_Buffer& buff, int& r) { r = read_signed<int>(buff); return buff; }
			In_Buffer& operator>>( In_Buffer& buff, LL& r) { r = read_signed<LL>(buff); return buff; }
			
			In_Buffer& operator>>( In_Buffer& buff, string& r) {
				r.clear();
			
				char c = buff.get_unchecked();
				while(c <= ' ') c = buff.get_unchecked();
			
				do {
					r.push_back( c );
					c = buff.get_unchecked();
				} while(c > ' ');
			
				return buff;
			}
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			class Out_Buffer : private Buffer {
			public:
				Out_Buffer(FILE* a_stream, int a_buffer_size) : Buffer(a_stream, a_buffer_size) {}
			
				~Out_Buffer() {
					flush();
				}
			
			public:
				void prepare(int num_chars) {
					if(buffer_size - pos >= num_chars) return;
					flush();
				}
			
				void flush() {
					FWRITE(buff, 1, pos, stream);
					pos = 0;
				}
			
			public:
				void put_unchecked(const char& c) {
					buff[ pos++ ] = c;
				}
			
				void put_unchecked(const char* str, int len) {
					memcpy(buff+pos, str, len);
					pos += len;
				}
			};
			
			
			
			
			
			
			template<class INT>
			void write_signed(Out_Buffer& buff, const INT& i) {
				buff.prepare(25);
			
				if(i == 0) {
					buff.put_unchecked('0');
					return;
				}
			
				auto ci = i;
			
				if(ci < 0) {
					buff.put_unchecked('-');
					ci = -ci;
				}
			
				const int sz = 25;
				char temp[sz];
				int pos = sz;
			
				while(ci) {
					temp[ --pos ] = '0' + ci%10;
					ci/=10;
				}
			
				buff.put_unchecked(temp+pos, sz-pos);
			}
			
			
			
			template<class INT>
			void write_unsigned(Out_Buffer& buff, const INT& i) {
				buff.prepare(25);
			
				if(i==0) {
					buff.put_unchecked('0');
					return;
				}
			
				const int sz = 25;
				char temp[sz];
				int pos = sz;
			
				auto ci = i;
			
				while(ci) {
					temp[ --pos ] = '0' + ci%10;
					ci/=10;
				}
			
				buff.put_unchecked(temp+pos, sz-pos);
			}
			
			
			
			Out_Buffer& operator<<( Out_Buffer& buff, const char& c) {
				buff.prepare(1);
				buff.put_unchecked( c );
				return buff;
			}
			
			Out_Buffer& operator<<( Out_Buffer& buff, const UI& r) { write_unsigned<UI>(buff, r); return buff; }
			Out_Buffer& operator<<( Out_Buffer& buff, const ULL& r) { write_unsigned<ULL>(buff, r); return buff; }
			
			Out_Buffer& operator<<( Out_Buffer& buff, const int& r) { write_signed<int>(buff, r); return buff; }
			Out_Buffer& operator<<( Out_Buffer& buff, const LL& r) { write_signed<LL>(buff, r); return buff; }
			
			Out_Buffer& operator<<( Out_Buffer& buff, const char* cstr) { auto len = strlen(cstr); buff.prepare(len); buff.put_unchecked(cstr, len); return buff; }
			Out_Buffer& operator<<( Out_Buffer& buff, const string& str) { buff.prepare( str.size() ); buff.put_unchecked(str.data(), str.size()); return buff; }
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			#define BUFF_SIZE 32768
			In_Buffer  fast_cin(  stdin,  BUFF_SIZE );
			Out_Buffer fast_cout( stdout, BUFF_SIZE );
			//Out_Buffer fast_cerr( stderr, BUFF_SIZE );
			
			char fast_endl = '\n';
			
		
		//
		// AMALGAMATE: "include/fast-io.hpp" ENDS HERE
		////////////////////////////////////////////////////////////////////////////////
		
		#define cin fast_cin
		#define cout fast_cout
		#define endl fast_endl
	#else
		
		////////////////////////////////////////////////////////////////////////////////
		// AMALGAMATE: "include/slow-io.hpp" BEGINS HERE
		//
			
			struct Slow_IO_Singleton {
				Slow_IO_Singleton() {
					ios_base::sync_with_stdio( false );
			
					std::cin.tie( nullptr );
					std::cout.tie( nullptr );
			
					setlocale(LC_ALL,"C");
			
					const int buffer_size = 32768;
			
					static char stdin_buffer[ buffer_size ];
					static char stdout_buffer[ buffer_size ];
			
					cin.rdbuf()->pubsetbuf( stdin_buffer, buffer_size );
					cout.rdbuf()->pubsetbuf( stdout_buffer, buffer_size );
				}
			
				~Slow_IO_Singleton() {
			
				}
			};
			
			
			Slow_IO_Singleton slow_io_singleton;
			
		
		//
		// AMALGAMATE: "include/slow-io.hpp" ENDS HERE
		////////////////////////////////////////////////////////////////////////////////
		
		#ifndef DEBUG
			#define endl '\n'
		#endif
	#endif
	
	
	////////////////////////////////////////////////////////////////////////////////
	// AMALGAMATE: "include/abbrevs-io.hpp" BEGINS HERE
	//
		
		
		
		
		int ri()   { int r; cin >> r; return r; }
		UI  rui()  { UI r; cin >> r; return r; }
		
		LL  rll()  { LL r;  cin >> r; return r; }
		ULL rull() { ULL r; cin >> r; return r; }
		
		string rstr() {string s; cin >> s; return s; }
		
	
	//
	// AMALGAMATE: "include/abbrevs-io.hpp" ENDS HERE
	////////////////////////////////////////////////////////////////////////////////
	
	
	
	////////////////////////////////////////////////////////////////////////////////
	// AMALGAMATE: "include/debug.hpp" BEGINS HERE
	//
		
		
		#define ASS(x) assert(x)
	
	//
	// AMALGAMATE: "include/debug.hpp" ENDS HERE
	////////////////////////////////////////////////////////////////////////////////
	
	
	
	
	//
	// for salgo
	#define CONTEST_MODE
	
	namespace salgo {};
	using namespace salgo;
	//

//
// AMALGAMATE: "include/template.hpp" ENDS HERE
////////////////////////////////////////////////////////////////////////////////


//#define assert(x)






//
// snippets/int-pow.hpp
//
template<class T, class E, class OP>
T int_pow(T a, E exp, const OP& op, const T& neutral) {
	// assert(exp >= 0);
	if(exp < 0) return 1;

	auto r = neutral;
	while(exp != 0) {
		if((exp & 1) != 0) {
			op(r, a);
			--exp;
		}
		else{
			exp >>= 1;
			op(a, a);
		}
	}
	return r;
}

template<class T, class E>
T int_pow(const T& a, const E& exp) {
	auto lambda = [](T& aa, const T& bb){ aa *= bb; };
	return int_pow<T,E,decltype(lambda)>(a, exp, lambda, T(1));
}







//
// snippets/modulo.hpp
//
uint32_t MOD = 1e9 + 7;

class Modulo {
public:
	using H = uint32_t;
	H h = 0;

public:
	Modulo() = default;
	Modulo(H x) : h( x % MOD ) {}

	Modulo(const Modulo&) = default;

public:
	Modulo& operator+=(const Modulo& o) {
		h += o.h;
		if(h >= MOD) h -= MOD;
		return *this;
	}

	Modulo& operator-=(const Modulo& o) {
		h = MOD + h - o.h;
		if(h >= MOD) h -= MOD;
		return *this;
	}

	Modulo& operator*=(const Modulo& o) {
		h = (1ULL * h * o.h) % MOD;
		return *this;
	}

	Modulo& operator/=(const Modulo& o) {
		const auto TOTIENT = MOD-1;
		*this *= int_pow(o, TOTIENT-1);
		return *this;
	}

	bool operator==(const Modulo& o) const { return h == o.h; }
	bool operator!=(const Modulo& o) const { return h != o.h; }


	Modulo operator+(const Modulo& o) const { return Modulo(*this) += o; }
	Modulo operator-(const Modulo& o) const { return Modulo(*this) -= o; }
	Modulo operator*(const Modulo& o) const { return Modulo(*this) *= o; }
	Modulo operator/(const Modulo& o) const { return Modulo(*this) /= o; }



	Modulo& operator--()    { if(h == 0) h = MOD; --h; return *this; }
	Modulo& operator++()    { ++h; if(h == MOD) h = 0; return *this; }
	Modulo  operator--(int) { auto m = *this; --(*this); return m; }
	Modulo  operator++(int) { auto m = *this; ++(*this); return m; }



	explicit operator H() const { return h; }
};

ostream& operator<<(ostream& os, const Modulo& modulo) {
	return os << modulo.h;
}













struct Range {
	int fi = -1;
	int la = -1;

	bool operator<(const Range& o) const {
		return pair{fi,la} < pair{o.fi, o.la};
	}

	int num() const { return la-fi+1; }
};

struct Test_Case {

	int n = RI;
	int m = RI;
	int num_lake = RI;
	int num_sea = RI;

	int num_not_reachable = 0;

	struct Vert {
		vector<int> tos;

		Range range;

		bool reachable = false;

		bool vis = false;
	};

	bool is_sea(int iv) {
		return num_lake <= iv && iv < num_lake + num_sea;
	}

	vector<Vert> verts;

	void dfs0(int iv) {
		auto& v = verts[iv];
		if(v.reachable) return;
		v.reachable = true;

		for(auto to : v.tos) {
			dfs0(to);
		}
	}

	void dfs(int iv) {
		auto& v = verts[iv];
		if(v.vis) return;
		v.vis = true;


		deque<Range> ranges;
		if(is_sea(iv)) ranges.push_back({ iv-num_lake, iv-num_lake });

		for(auto& to : v.tos) {
			dfs(to);

			auto& r = verts[to].range;
			if(r.fi != -1) {
				ranges.push_back(r);
			}
		}

		// auto asd = ranges;

		if(!ranges.empty()) {
			sort(ALL(ranges));

			while(ranges.size() > 1 && ranges[0].la >= ranges[1].fi - 1) {
				ranges[1].fi = ranges[0].fi;
				ranges.pop_front();
			}

			while(ranges.size() > 1 && ranges.back().la - num_sea >= ranges[0].fi - 1) {
				ranges.back().la = ranges[0].la + num_sea;
				ranges.pop_front();
			}

			// if(ranges.size() != 1) {
			// 	cout << "DBG ranges at vert " << iv << endl;
			// 	for(auto& r : asd) cout << r.fi << " -> " << r.la << endl;
			// 	cout << endl;

			// }

			assert(ranges.size() == 1);

			if(ranges[0].la - ranges[0].fi + 1 >= num_sea) {
				v.range = {0, num_sea-1};
			}
			else {
				v.range = ranges[0];
			}
		}
	}

	void subtask_a(const vector<Range>& ranges) {
		vector<Modulo> dp( ranges.size()+1 );

		dp[0] = 0;
		dp[1] = int_pow(Modulo(2), num_sea - ranges[0].num());

		// cout << "dp[1] == " << dp[1] << endl;

		int i_end = 0;
		FO(i, 1, ranges.size()) {
			// int num_new = ranges[i].la - ranges[i-1].la;
			dp[i+1] = dp[i];

			if(i_end >= 0) --i_end;

			while(i_end+1 < (int)ranges.size() && ranges[i_end+1].la < ranges[i-1].fi) ++i_end;

			while(i_end == -1 || ranges[i_end].la < ranges[i].fi) {
				int end_pos = ranges[i].fi-1;
				if(i_end+1 < (int)ranges.size()) REMIN(end_pos, ranges[i_end+1].la);

				int start_pos = ranges[i-1].fi;
				if(i_end >= 0) REMAX(start_pos, ranges[i_end].la + 1);

				// cout << endl << "dp step   i_end == " << i_end << "   start_pos == " << start_pos << "   end_pos == " << end_pos << endl;

				dp[i+1] += (int_pow(Modulo(2), num_sea) - dp[i_end+1])
					/ int_pow(Modulo(2), ranges[i].la - start_pos +1)
					* (int_pow(Modulo(2), end_pos - start_pos +1) - 1);

				// cout << "dp += " << (int_pow(Modulo(2), num_sea) - dp[i_end+1]) << " / " <<
					// int_pow(Modulo(2), ranges[i].la - start_pos +1) << " * " <<
					// (int_pow(Modulo(2), end_pos - start_pos +1) - 1) << endl;
				
				++i_end;
			}

			// cout << "dp[" << i+1 << "] == " << dp[i+1] << endl;
		}

		auto r = int_pow(Modulo(2), num_sea) - dp[ ranges.size() ];

		r *= int_pow(Modulo(2), num_not_reachable);

		cout << r << endl;
	}

	void subtask_b(const vector<Range>&) {
		
	}

	void solve() {
		// cout << "Case #" << icase+1 << ": ";
		verts.resize(n);
		FOR(i,m) {
			int a = RI-1;
			string edge = RSTR;
			int b = RI-1;

			if(edge == "->") {
				verts[a].tos.push_back(b);
			}
			else {
				verts[a].tos.push_back(b);
				verts[b].tos.push_back(a);
			}
		}

		FOR(i, num_lake) {
			dfs0(i);
		}

		// delete not-reachable sea settlements
		n = 0;
		vector<int> v_remap( verts.size() );
		FOR(i, verts.size()) {
			if(is_sea(i) && !verts[i].reachable) {
				// delete!
				++num_not_reachable;
			}
			else {
				v_remap[i] = n;
				verts[n] = verts[i];
				++n;
			}
		}
		verts.resize(n);

		for(auto& v : verts) {
			for(auto& to : v.tos) {
				to = v_remap[to];
			}
		}

		num_sea -= num_not_reachable;

		// cout << "deleted " << num_not_reachable << " not-reachable sea settlements" << endl;

		FOR(asd,10) FOR(i,n) {
			dfs(i);
		}

		// cout << "ranges:" << endl;
		// FOR(i, num_lake) {
		// 	cout << i+1 << ": " << verts[i].range.fi << " -> " << verts[i].range.la << endl;
		// }

		int full_range_at = -1;

		auto is_full = [&](const auto& range) {
			return range.fi == 0 && range.la == num_sea-1;
		};

		FOR(i, num_lake) {
			if(is_full(verts[i].range)) {
				full_range_at = i;
				break;
			}
		}

		vector<Range> ranges;
		FOR(i, num_lake) ranges.push_back( verts[i].range );

		auto cycle = [&](const auto& v, int at) {
			vector<Range> r;
			FO(i, at, num_lake) {
				r.push_back( v[i] );
			}
			FO(i, 0, at) {
				r.push_back( v[i] );
			}
			return r;
		};

		if(full_range_at != -1) {
			ranges = cycle(ranges, full_range_at);
		}


		{
			decltype(ranges) res;
			for(auto& r : ranges) {
				if(!is_full(r)) res.push_back(r);
			}
			ranges = std::move(res);
		}

		int num_inc = 0;
		int num_dec = 0;
		FOR(i, ranges.size()) {
			int j = (i+1) % ranges.size();

			if(ranges[i].fi < ranges[j].fi) ++num_inc;
			if(ranges[i].la < ranges[j].la) ++num_inc;

			if(ranges[i].fi > ranges[j].fi) ++num_dec;
			if(ranges[i].la > ranges[j].la) ++num_dec;
		}

		if(num_dec > num_inc) {
			reverse(ALL(ranges));
		}

		auto fix = [&](auto& vec) {
			FO(i, 1, vec.size()) {
				if(vec[i-1].fi > vec[i].fi) {
					vec[i].fi += num_sea;
					vec[i].la += num_sea;
				}
			}
		};

		fix(ranges);

		int break_before = -1;
		FOR(i, ranges.size()) {
			int j = (i+1) % ranges.size();

			auto i_range = ranges[i];
			auto j_range = ranges[j];

			if(i_range.fi > j_range.fi || i_range.la > j_range.la) {
				j_range.fi += num_sea;
				j_range.la += num_sea;
			}

			if(i_range.la < j_range.fi) {
				break_before = j;
				break;
			}
		}

		if(break_before != -1) {
			ranges = cycle(ranges, break_before);
		}

		fix(ranges);

		// cout << "RANGES:" << endl;
		// for(auto& r : ranges) cout << r.fi << " -> " << r.la << endl;
		// cout << endl;

		if(full_range_at != -1 || break_before != -1) {
			// cout << "SUBTASK A" << endl;
			subtask_a(ranges);
		}
		else {
			// cout << "SUBTASK B" << endl;
			subtask_b(ranges);
		}
	}

	int icase = -1;
}; // struct Test_Case



int main() {
	int num_cases = READ_NUM_TEST_CASES ? RI : 1;
	
	FOR(i, num_cases) {
		Test_Case tc;
		tc.icase = i;
		tc.solve();
	}

	return 0;
}