oj.uz

Submission #704918

# Submission time Handle Problem Language Result Execution time Memory
704918 2023-03-03T06:44:15 Z guagua0407 Naboj (COCI22_naboj) C++17
110 / 110
 272 ms 21384 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
#define all(x) x.begin(),x.end()

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n,m;
    cin>>n>>m;
    vector<int> in(n,0);
    vector<bool> visited(n,false);
    vector<int> adj[n],adjr[n];
    for(int i=0;i<m;i++){
        int a,b;
        cin>>a>>b;
        a--;
        b--;
        in[a]++;
        adj[b].push_back(a);
    }
    queue<int> q;
    for(int i=0;i<n;i++){
        if(in[i]==0){
            visited[i]=true;
            q.push(i);
        }
    }
    vector<pair<int,int>> ans;
    while(!q.empty()){
        int v=q.front();
        q.pop();
        ans.push_back({v,0});
        for(auto u:adj[v]){
            if(visited[u]){
                cout<<-1;
                return 0;
            }
            in[u]--;
            if(in[u]==0){
                visited[u]=true;
                q.push(u);
            }
        }
    }
    if(ans.size()!=n){
        cout<<-1;
        return 0;
    }
    cout<<ans.size()<<'\n';
    reverse(all(ans));
    for(auto v:ans){
        cout<<v.f+1<<' '<<v.s<<'\n';
    }
}

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:48:18: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |     if(ans.size()!=n){
      |        ~~~~~~~~~~^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 324 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 324 KB Output is correct
14 Correct 1 ms 316 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 18396 KB Output is correct
2 Correct 118 ms 19108 KB Output is correct
3 Correct 58 ms 10668 KB Output is correct
4 Correct 115 ms 19096 KB Output is correct
5 Correct 125 ms 19136 KB Output is correct
6 Correct 118 ms 19132 KB Output is correct
7 Correct 112 ms 19140 KB Output is correct
8 Correct 96 ms 15148 KB Output is correct
9 Correct 110 ms 19132 KB Output is correct
10 Correct 115 ms 19100 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 324 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 324 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 108 ms 18396 KB Output is correct
16 Correct 118 ms 19108 KB Output is correct
17 Correct 58 ms 10668 KB Output is correct
18 Correct 115 ms 19096 KB Output is correct
19 Correct 125 ms 19136 KB Output is correct
20 Correct 118 ms 19132 KB Output is correct
21 Correct 112 ms 19140 KB Output is correct
22 Correct 96 ms 15148 KB Output is correct
23 Correct 110 ms 19132 KB Output is correct
24 Correct 115 ms 19100 KB Output is correct
25 Correct 175 ms 12528 KB Output is correct
26 Correct 127 ms 17668 KB Output is correct
27 Correct 157 ms 17468 KB Output is correct
28 Correct 162 ms 17644 KB Output is correct
29 Correct 107 ms 18252 KB Output is correct
30 Correct 167 ms 17520 KB Output is correct
31 Correct 21 ms 2564 KB Output is correct
32 Correct 133 ms 21232 KB Output is correct
33 Correct 272 ms 21164 KB Output is correct
34 Correct 157 ms 21228 KB Output is correct
35 Correct 237 ms 21372 KB Output is correct
36 Correct 140 ms 21384 KB Output is correct
37 Correct 216 ms 21072 KB Output is correct
38 Correct 186 ms 21176 KB Output is correct
39 Correct 223 ms 21196 KB Output is correct
40 Correct 190 ms 21244 KB Output is correct
41 Correct 217 ms 21224 KB Output is correct
42 Correct 221 ms 21332 KB Output is correct
43 Correct 155 ms 21196 KB Output is correct
44 Correct 237 ms 21308 KB Output is correct
45 Correct 164 ms 21284 KB Output is correct
46 Correct 196 ms 21176 KB Output is correct