oj.uz

Submission #666752

# Submission time Handle Problem Language Result Execution time Memory
666752 2022-11-29T14:03:22 Z neki Naboj (COCI22_naboj) C++14
110 / 110
 563 ms 41904 KB 
#include <bits/stdc++.h>
#define ll long long
#define vc vector

using namespace std;

int main() {
    ll n, m;cin >> n >> m;
    vc<vc<ll>> out(n+1), in(n+1);
    for(ll i=0;i<m;++i){
        ll a, b;cin >> a >> b;
        out[a].push_back(b);
        in[b].push_back(a);
    }
    
    vc<ll> cntin(n+1, 0), cntout(n+1, 0);
    for(ll i=1;i<=n;++i) cntin[i]=in[i].size(), cntout[i]=out[i].size();
    queue<ll> q;
    vc<ll> vis(n+1, 0), ch(n+1, 0);
    for(ll i=1;i<=n;++i) if(cntin[i]==0 or cntout[i]==0) vis[i]=1, ch[i]=(cntin[i]==0)? 1LL:0LL, q.push(i);//, cout <<i << " ";cout << endl;
    
    vc<ll> ans;
    while(q.size()){
        ll u=q.front();q.pop();
        ans.emplace_back(u);
        for(auto v: in[u])if(!vis[v]){
            --cntout[v];
            if(cntin[v]==0 or cntout[v]==0) q.push(v), ch[v]=(cntin[v]==0)? 1LL:0LL, vis[v]=1;
        }
        for(auto v: out[u])if(!vis[v]){
            --cntin[v];
            if(cntin[v]==0 or cntout[v]==0) q.push(v), ch[v]=(cntout[v]==0)? 0LL:1LL, vis[v]=1;
        }
    }
    if(ans.size()==n){
        cout << ans.size()<< endl;
        reverse(ans.begin(), ans.end());
        for(auto v: ans) cout << v << " " << ch[v] <<'\n';
    }
    else cout << -1 <<endl;
}

Compilation message

naboj.cpp: In function 'int main()':
naboj.cpp:35:18: 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]
   35 |     if(ans.size()==n){
      |        ~~~~~~~~~~^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 296 KB Output is correct
6 Correct 0 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 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 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 275 ms 31848 KB Output is correct
2 Correct 260 ms 31792 KB Output is correct
3 Correct 157 ms 16900 KB Output is correct
4 Correct 283 ms 31884 KB Output is correct
5 Correct 263 ms 31824 KB Output is correct
6 Correct 283 ms 31840 KB Output is correct
7 Correct 270 ms 31844 KB Output is correct
8 Correct 204 ms 24868 KB Output is correct
9 Correct 329 ms 31872 KB Output is correct
10 Correct 279 ms 31824 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 296 KB Output is correct
6 Correct 0 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 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 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 275 ms 31848 KB Output is correct
16 Correct 260 ms 31792 KB Output is correct
17 Correct 157 ms 16900 KB Output is correct
18 Correct 283 ms 31884 KB Output is correct
19 Correct 263 ms 31824 KB Output is correct
20 Correct 283 ms 31840 KB Output is correct
21 Correct 270 ms 31844 KB Output is correct
22 Correct 204 ms 24868 KB Output is correct
23 Correct 329 ms 31872 KB Output is correct
24 Correct 279 ms 31824 KB Output is correct
25 Correct 396 ms 29128 KB Output is correct
26 Correct 351 ms 33900 KB Output is correct
27 Correct 390 ms 35392 KB Output is correct
28 Correct 538 ms 38896 KB Output is correct
29 Correct 309 ms 32192 KB Output is correct
30 Correct 502 ms 38484 KB Output is correct
31 Correct 55 ms 5340 KB Output is correct
32 Correct 301 ms 33348 KB Output is correct
33 Correct 533 ms 40512 KB Output is correct
34 Correct 304 ms 33904 KB Output is correct
35 Correct 490 ms 40668 KB Output is correct
36 Correct 287 ms 33280 KB Output is correct
37 Correct 458 ms 38960 KB Output is correct
38 Correct 416 ms 36660 KB Output is correct
39 Correct 488 ms 40328 KB Output is correct
40 Correct 440 ms 37932 KB Output is correct
41 Correct 440 ms 37764 KB Output is correct
42 Correct 556 ms 41512 KB Output is correct
43 Correct 335 ms 34504 KB Output is correct
44 Correct 563 ms 41904 KB Output is correct
45 Correct 296 ms 33768 KB Output is correct
46 Correct 438 ms 38016 KB Output is correct