Sugi Pula Macaz

#include <iostream>
#include <cstring>
using namespace std;

int n,A[101][101],m,v[101],nr,viz[101];
bool ok;
void citire()
{
    int x,y;
    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        cin>>x>>y;
        A[x][y]=1;
    }

}

void DFS(int x)
{
    viz[x] = 1;
    v[x]++;
    for(int i=1; i<=n; i++)
        if(A[x][i] && !viz[i])
            DFS(i);
}

int main()
{
    int i;
    citire();
    for (i=1; i<=n; i++)
    {
        DFS(i);
        memset(viz,0,sizeof(viz));
    }
    for (i=1; i<=n; i++)
        if (v[i]==n)
        {
            cout<<i;
            break;
        }

    if (i==n+1)
        cout<<"NU EXISTA";
    return 0;
}