Submission #788220

#	Time	Username	Problem	Language	Result	Execution time	Memory
788220		Username4132	Povjerenstvo (COI22_povjerenstvo)	C++14	13 / 100	211 ms	73168 KiB

Main

#include<iostream>
#include<vector>
using namespace std;
#define forn(i, n) for(int i=0; i<(int)n; ++i)
#define PB push_back

const int MAXN = 500010;
bool yes[MAXN], vis[MAXN];
int n, m, ans;
vector<int> g[MAXN];

void dfs(int v){
    vis[v]=true;
    bool res=false;
    for(int to:g[v]){
        if(!vis[to]) dfs(to);
        res|=yes[to];
    }
    yes[v]=!res;
}

int main(){
    scanf("%d %d", &n, &m);
    forn(i, m){
        int a, b; scanf("%d %d", &a, &b); --a, --b;
        g[a].PB(b);
    }
    forn(i, n) if(!vis[i]) dfs(i);
    forn(i, n) ans+=yes[i];
    printf("%d\n", ans);
    forn(i, n) if(yes[i]) printf("%d ", i+1);
    printf("\n");
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:25:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         int a, b; scanf("%d %d", &a, &b); --a, --b;
      |                   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 21
• Subtask 3: 0 / 33
• Subtask 4: 0 / 33