oj.uz

Submission #782594

# Submission time Handle Problem Language Result Execution time Memory
782594 2023-07-14T06:18:12 Z kebine Naboj (COCI22_naboj) C++17
0 / 110
 56 ms 14532 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define endl "\n"
#define pii pair<ll,ll>
#define pb push_back
#define vi vector<ll>
#define pque priority_queue
#define pqueg priority_queue<ll,vector<ll>,greater<ll>>
#define que queue<ll>
#define FOR(m,i,n) for(int i=(m); i<=(n); i++)
#define FORM(m,i,n) for(int i=(m); i>=(n); i--)
ll n,m,u,v;
bool vis[200200];
vector<ll> adj[200200],ans;
ll top[200200];
queue<ll> q;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> m;
  FOR(1,i,m) {
    cin >> u >> v;
    adj[v].pb(u);
    top[u]++;
  }
  FOR(1,i,n) {
    if(top[i] == 0) {
      q.push(i);
      vis[i] = true;
    }
  }
  while(!q.empty()) {
    ll x = q.front();
    q.pop();
    for(auto i : adj[x]) {
      top[i]--;
      if(top[i] == 0 && !vis[i]) {
        vis[i] = true;
        ans.pb(i);
        q.push(i);
      }
    }
  }
  if(ans.size() != n) {
    cout << -1 << endl;
    return 0;
  }
  for(auto i : ans) {
    cout << i << " 1" << endl;
  }
}

/*
5 5
3 1
2 3
4 2
5 2
5 4
*/

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:47:17: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   47 |   if(ans.size() != n) {
      |      ~~~~~~~~~~~^~~~

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5032 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5036 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Incorrect 3 ms 4948 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 56 ms 14532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5032 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5036 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Incorrect 3 ms 4948 KB Output isn't correct
9 Halted 0 ms 0 KB -