#include <iostream> #include <set> #include <vector> #include <queue> #include <algorithm> using namespace std; bool operatorMode=true; //true=x false=y struct Point{ int x,y; }; struct Segment{ int x1,y1,x2,y2; bool operator<(const Segment& seg)const{ if(operatorMode){ if(x1!=seg.x1) return x1<seg.x1; return y1<seg.y1; } else{ if(y1!=seg.y1) return y1<seg.y1; return x1<seg.x1; } } bool operator!=(const Segment& seg)const{ return x1!=seg.x1 || x2!=seg.x2 || y1!=seg.y1 || y2!=seg.y2; } bool containsPoint(int x, int y)const{ return x1<=x && x<=x2 && y1<=y && y<=y2; } bool vertical()const{ return x1==x2; } }; struct Field{ set<int> *VDotContainer; set<int> *HDotContainer; set<Segment> Path; int n,m; void init(int nn, int mm){ n=nn; m=mm; VDotContainer = new set<int>[m]; HDotContainer = new set<int>[n]; Path.insert({0,-1,0,0}); Path.insert({0,0,m-1,0,}); Path.insert({m-1,0,m-1,n-1}); Path.insert({m-1,n-1,m,n-1}); } void deinit(){ delete []VDotContainer; delete []HDotContainer; } void addNeutralDot(int x, int y){ VDotContainer[x].insert(y); HDotContainer[y].insert(x); } vector<Segment> addL(int x, int y){ vector<Segment>newSegs; //find first contact operatorMode=true; auto it1 = Path.lower_bound({x,-10,x,-10}); //zawsze znajdzie pionowy odcinek if(it1->x1 == x) newSegs.push_back({x, it1->y1, x, y}); else{ --it1; newSegs.push_back({it1->x1, it1->y1, x, it1->y1}); newSegs.push_back({x, it1->y1, x, y}); } //find second contact operatorMode=false; auto it2 = Path.lower_bound({-10,y,-10,y}); if(it2->y1 == y) newSegs.push_back({x, y, it2->x2, y}); else{ --it2; newSegs.push_back({x, y, it2->x1, y}); newSegs.push_back({it2->x2, y, it2->x2, it2->y2}); } //remove old segments and insert new ones Path.erase(it1, it2); Path.erase(it2); for(Segment seg : newSegs) Path.insert(seg); return move(newSegs); } Point firstDotOnSegment(Segment seg){ if(seg.vertical()){ auto it = VDotContainer[seg.x1].lower_bound(seg.y1); if(it==VDotContainer[seg.x1].end() || *it>seg.y2) return {-42,-42}; return {seg.x1, *it}; } else{ auto it = HDotContainer[seg.y1].lower_bound(seg.x1); if(it==HDotContainer[seg.y1].end() || *it>seg.x2) return {-42, -42}; return {*it, seg.y1}; } } void addDotOnPath(int x, int y){ addNeutralDot(x,y); queue<Segment>Q; Q.push(*findPath(x,y)); while(!Q.empty()){ Segment seg = Q.front(); Q.pop(); auto it = Path.find(seg); if(it==Path.end() || *it!=seg) continue; Point p = firstDotOnSegment(seg); if(p.x==-42) continue; vector<Segment>newSegs = addL(p.x-1, p.y+1); for(Segment s : newSegs) Q.push(s); } } bool isOnPath(int x, int y)const{ auto it = prev(Path.lower_bound({x,y,x,y})); return it->containsPoint(x,y); } set<Segment>::iterator findPath(int x, int y)const{ return prev(Path.lower_bound({x,y,x,y})); } }; int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int n,m,k,x=0; cin >> n >> m >> k; Field f1, f2; f1.init(n, m); f2.init(m, n); while(k--){ int r,c,z; cin >> r >> c >> z; int posX = (c^x)%m; int posY = (r^x)%n; bool onPath1 = f1.isOnPath(posX, posY); bool onPath2 = f2.isOnPath(posY, posX); if(onPath1 && onPath2){ cout << "TAK\n"; x^=z; } else{ if(onPath1) f1.addDotOnPath(posX, posY); else f1.addNeutralDot(posX, posY); if(onPath2) f2.addDotOnPath(posY, posX); else f2.addNeutralDot(posY, posX); cout << "NIE\n"; } } f1.deinit(); f2.deinit(); return 0; }
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 | #include <iostream> #include <set> #include <vector> #include <queue> #include <algorithm> using namespace std; bool operatorMode=true; //true=x false=y struct Point{ int x,y; }; struct Segment{ int x1,y1,x2,y2; bool operator<(const Segment& seg)const{ if(operatorMode){ if(x1!=seg.x1) return x1<seg.x1; return y1<seg.y1; } else{ if(y1!=seg.y1) return y1<seg.y1; return x1<seg.x1; } } bool operator!=(const Segment& seg)const{ return x1!=seg.x1 || x2!=seg.x2 || y1!=seg.y1 || y2!=seg.y2; } bool containsPoint(int x, int y)const{ return x1<=x && x<=x2 && y1<=y && y<=y2; } bool vertical()const{ return x1==x2; } }; struct Field{ set<int> *VDotContainer; set<int> *HDotContainer; set<Segment> Path; int n,m; void init(int nn, int mm){ n=nn; m=mm; VDotContainer = new set<int>[m]; HDotContainer = new set<int>[n]; Path.insert({0,-1,0,0}); Path.insert({0,0,m-1,0,}); Path.insert({m-1,0,m-1,n-1}); Path.insert({m-1,n-1,m,n-1}); } void deinit(){ delete []VDotContainer; delete []HDotContainer; } void addNeutralDot(int x, int y){ VDotContainer[x].insert(y); HDotContainer[y].insert(x); } vector<Segment> addL(int x, int y){ vector<Segment>newSegs; //find first contact operatorMode=true; auto it1 = Path.lower_bound({x,-10,x,-10}); //zawsze znajdzie pionowy odcinek if(it1->x1 == x) newSegs.push_back({x, it1->y1, x, y}); else{ --it1; newSegs.push_back({it1->x1, it1->y1, x, it1->y1}); newSegs.push_back({x, it1->y1, x, y}); } //find second contact operatorMode=false; auto it2 = Path.lower_bound({-10,y,-10,y}); if(it2->y1 == y) newSegs.push_back({x, y, it2->x2, y}); else{ --it2; newSegs.push_back({x, y, it2->x1, y}); newSegs.push_back({it2->x2, y, it2->x2, it2->y2}); } //remove old segments and insert new ones Path.erase(it1, it2); Path.erase(it2); for(Segment seg : newSegs) Path.insert(seg); return move(newSegs); } Point firstDotOnSegment(Segment seg){ if(seg.vertical()){ auto it = VDotContainer[seg.x1].lower_bound(seg.y1); if(it==VDotContainer[seg.x1].end() || *it>seg.y2) return {-42,-42}; return {seg.x1, *it}; } else{ auto it = HDotContainer[seg.y1].lower_bound(seg.x1); if(it==HDotContainer[seg.y1].end() || *it>seg.x2) return {-42, -42}; return {*it, seg.y1}; } } void addDotOnPath(int x, int y){ addNeutralDot(x,y); queue<Segment>Q; Q.push(*findPath(x,y)); while(!Q.empty()){ Segment seg = Q.front(); Q.pop(); auto it = Path.find(seg); if(it==Path.end() || *it!=seg) continue; Point p = firstDotOnSegment(seg); if(p.x==-42) continue; vector<Segment>newSegs = addL(p.x-1, p.y+1); for(Segment s : newSegs) Q.push(s); } } bool isOnPath(int x, int y)const{ auto it = prev(Path.lower_bound({x,y,x,y})); return it->containsPoint(x,y); } set<Segment>::iterator findPath(int x, int y)const{ return prev(Path.lower_bound({x,y,x,y})); } }; int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int n,m,k,x=0; cin >> n >> m >> k; Field f1, f2; f1.init(n, m); f2.init(m, n); while(k--){ int r,c,z; cin >> r >> c >> z; int posX = (c^x)%m; int posY = (r^x)%n; bool onPath1 = f1.isOnPath(posX, posY); bool onPath2 = f2.isOnPath(posY, posX); if(onPath1 && onPath2){ cout << "TAK\n"; x^=z; } else{ if(onPath1) f1.addDotOnPath(posX, posY); else f1.addNeutralDot(posX, posY); if(onPath2) f2.addDotOnPath(posY, posX); else f2.addNeutralDot(posY, posX); cout << "NIE\n"; } } f1.deinit(); f2.deinit(); return 0; } |