oj.uz

Submission #782606

# Submission time Handle Problem Language Result Execution time Memory
782606 2023-07-14T06:24:47 Z christinelynn Naboj (COCI22_naboj) C++17
110 / 110
 175 ms 21068 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;
      ans.pb(i);
    }
  }
  while(!q.empty()) {
    ll x = q.front();
    q.pop();
    for(auto i : adj[x]) {
      if(!vis[i]) {
        top[i]--;
        if(top[i] == 0) {
          vis[i] = true;
          ans.pb(i);
          q.push(i);
        }
      }
    }
  }
  if(ans.size() != n) {
    cout << -1 << endl;
    return 0;
  }
  cout << n << endl;
  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:50:17: 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]
   50 |   if(ans.size() != n) {
      |      ~~~~~~~~~~~^~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 5036 KB Output is correct
3 Correct 3 ms 5040 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 16320 KB Output is correct
2 Correct 84 ms 16508 KB Output is correct
3 Correct 35 ms 11048 KB Output is correct
4 Correct 70 ms 16624 KB Output is correct
5 Correct 73 ms 16576 KB Output is correct
6 Correct 71 ms 16572 KB Output is correct
7 Correct 80 ms 16572 KB Output is correct
8 Correct 55 ms 14264 KB Output is correct
9 Correct 76 ms 16576 KB Output is correct
10 Correct 74 ms 16564 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 5036 KB Output is correct
3 Correct 3 ms 5040 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 73 ms 16320 KB Output is correct
16 Correct 84 ms 16508 KB Output is correct
17 Correct 35 ms 11048 KB Output is correct
18 Correct 70 ms 16624 KB Output is correct
19 Correct 73 ms 16576 KB Output is correct
20 Correct 71 ms 16572 KB Output is correct
21 Correct 80 ms 16572 KB Output is correct
22 Correct 55 ms 14264 KB Output is correct
23 Correct 76 ms 16576 KB Output is correct
24 Correct 74 ms 16564 KB Output is correct
25 Correct 104 ms 15232 KB Output is correct
26 Correct 98 ms 16196 KB Output is correct
27 Correct 96 ms 16412 KB Output is correct
28 Correct 116 ms 17440 KB Output is correct
29 Correct 80 ms 16380 KB Output is correct
30 Correct 137 ms 17344 KB Output is correct
31 Correct 18 ms 7184 KB Output is correct
32 Correct 86 ms 18760 KB Output is correct
33 Correct 146 ms 20664 KB Output is correct
34 Correct 96 ms 19000 KB Output is correct
35 Correct 167 ms 20772 KB Output is correct
36 Correct 78 ms 18620 KB Output is correct
37 Correct 148 ms 20168 KB Output is correct
38 Correct 146 ms 19760 KB Output is correct
39 Correct 153 ms 20608 KB Output is correct
40 Correct 137 ms 19944 KB Output is correct
41 Correct 127 ms 20024 KB Output is correct
42 Correct 175 ms 21028 KB Output is correct
43 Correct 91 ms 19372 KB Output is correct
44 Correct 150 ms 21068 KB Output is correct
45 Correct 92 ms 19024 KB Output is correct
46 Correct 119 ms 19976 KB Output is correct