#include<bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define int long long
using namespace std;
const int N=1e6,M=2e3,mod=1e9+7;
int a[510][510];
map<pair<int,int>,int>vis;
vector<pair<int,int>>v;
pair<int,int>ans;
main()
{
v.clear();
ans={0,0};
vis.clear();
int n,m;
cin>>n>>m;
for(int i=0;i<n;i++)
for(int j=0;j<n;j++)
cin>>a[i][j];
v.pb({0,1});
v.pb({1,2});
vis[{0,1}]=1;
vis[{1,2}]=1;
while(1){
int x=v.size()-1;
if(vis[{v[x].S,a[v[x].S-1][v[x].F-1]}]==1){
ans.F=v[x].S;
ans.S=a[v[x].S-1][v[x].F-1];
break;
}
vis[{v[x].S,a[v[x].S-1][v[x].F-1]}]=1;
v.pb({v[x].S,a[v[x].S-1][v[x].F-1]});
}
reverse(v.begin(),v.end());
while((v.size())&&((*v.rbegin()).F!=ans.F||(*v.rbegin()).S!=ans.S)&&m>0)
v.pop_back(),m--;
reve rse(v.begin(),v.end());
int xx=m%v.size();
if(xx==0)
xx=v.size();
xx--;
assert(v[xx].S>1);
cout<<v[xx].S<<endl;
return 0;
}
Compilation message
politicari.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
12 | main()
| ^~~~
politicari.cpp: In function 'int main()':
politicari.cpp:53:5: error: 'reve' was not declared in this scope; did you mean 'remove'?
53 | reve rse(v.begin(),v.end());
| ^~~~
| remove
