oj.uz

Submission #789049

# Submission time Handle Problem Language Result Execution time Memory
789049 2023-07-20T22:19:44 Z Username4132 Povjerenstvo (COI22_povjerenstvo) C++14
0 / 100
 89 ms 47500 KB 
#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
#define forn(i, n) for(int i=0; i<(int)n; ++i)
#define PB push_back

const int MAXN = 200010;
int n, m, cn;
bool vis[MAXN], ans[MAXN];
vector<int> g[MAXN], gi[MAXN], order;

void dfs1(int v){
    vis[v]=true;
    for(int to:gi[v]) if(!vis[to]) dfs1(to);
    order.PB(v);
}

void dfs2(int v, bool flag){
    vis[v]=true;
    if(flag){
        ans[v]=true;
        for(int to:g[v]) ans[v]&=!ans[to];
    }
    for(int to:g[v]) if(!vis[to]) dfs2(to, !flag);
}

int main(){
    scanf("%d %d", &n, &m);
    forn(i, m){
        int a, b; scanf("%d %d", &a, &b); --a, --b;
        g[a].PB(b), gi[b].PB(a);
    }
    forn(i, n) if(!vis[i]) dfs1(i);
    forn(i, n) vis[i]=false;
    reverse(order.begin(), order.end());
    for(int el:order) if(!vis[el]) dfs2(el, true);
    forn(i, n) cn+=ans[i];
    printf("%d\n", cn);
    forn(i, n) if(ans[i]) printf("%d ", i+1);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:31:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         int a, b; scanf("%d %d", &a, &b); --a, --b;
      |                   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 74 ms 47436 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 21.0

# Verdict Execution time Memory Grader output
1 Runtime error 89 ms 47500 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10012 KB Output is correct
2 Correct 6 ms 9940 KB Output is correct
3 Correct 7 ms 9940 KB Output is correct
4 Correct 6 ms 9976 KB Output is correct
5 Correct 6 ms 9940 KB Output is correct
6 Incorrect 6 ms 9892 KB For each person outside the committee there should be someone in the committee who they dislike.
7 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Runtime error 74 ms 47436 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -