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
#include <bits/stdc++.h>
#include "sonlib.h"
using namespace std;

int n, s, i, u, v;
vector <int> A, B;

int main ()
	{
	n = GetN();
	s = GetSubtask();
	
	assert(s == 1);
	
	Examine();
	
	for (i=2; i<=n; i++)
		if (MoveProbe(i) == true)
			break;
	
	if (i>n)
		{
		v = n;
		
		MoveProbe(1);
		MoveProbe(n);
		
		for (i=2; i<n; i++)
			if (MoveProbe(i) == true)
				break;
		
		if (i == n)
			{
			MoveProbe(1);
			for (i=2; i<=n; i++)
				{
				MoveProbe(i);
				Examine();
				MoveProbe(1);
				}
			return 0;
			}
		
		u = i;
		}
	else
		{
		u = i;
		v = i-1;
		}
	
	A.push_back(u);
	B.push_back(v);
	
	MoveProbe(v);
	MoveProbe(1);
	
	for (i=2; i<=n; i++)
		if (i!=u && i!=v)
			{
			MoveProbe(i);
			if (MoveProbe(u) == true)
				{
				B.push_back(i);
				MoveProbe(v);
				MoveProbe(1);
				}
			else
				A.push_back(i);
			}
	
	for (int a : A)
		{
		MoveProbe(v);
		MoveProbe(a);
		Examine();
		MoveProbe(v);
		MoveProbe(1);
		}
	
	for (int b : B)
		{
		MoveProbe(b);
		Examine();
		MoveProbe(1);
		}
	
	return 0;
	}