#include "game.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pb push_back
#define maxn 300005
int N, K;
vector<int> adj[maxn];
void init(int n, int k){
N = n, K = k;
for(int i = 0; i < k - 1; ++i) adj[i].pb(i + 1);
}
int add_teleporter(int u, int v){
adj[u].pb(v);
vector<bool> vis(N + 5, 0);
queue<int> bfs;
bfs.push(0), vis[0] = 1;
while(bfs.size()){
int u = bfs.front(); bfs.pop();
for(auto v:adj[u]){
if(vis[v]){
if(v < K) return 1;
continue;
}
bfs.push(v);
vis[v] = 1;
}
}
return 0;
}
int main(){
int n, m, k; cin >> n >> m >> k;
init(n, k);
bool ok = 1;
for(int i = 0; i < m; ++i){
int u, v; cin >> u >> v;
int r = add_teleporter(u, v);
if(r) {
cout << i << '\n';
ok = 0;
break;
}
}
if(ok) cout << m << '\n';
}
Compilation message
/usr/bin/ld: /tmp/ccPl5zCb.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccmzWbx9.o:game.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
