This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
int N, n, a, b, f[1001][1001], fix[1001], p[1001];
void initialize (int n) {
N = n;
for (int i=0; i<N; i++){
p[i] = i;
fix[i] = 1;
}
}
int getcol (int l){
if (l == p[l])
return l;
return getcol (p[l]);
}
void col (int k, int l){
int w = getcol(k);
int u = getcol(l);
p[w] = u;
fix[u]+=fix[w];
fix[w] = 0;
p[k] = l;
for (int i = 0; i < N; i++){
f[u][i]+=f[w][i];
f[i][u]+=f[i][w];
}
}
int hasEdge (int u, int v){
cin >> a >> b;
a = getcol(a);
b = getcol(b);
f[a][b]++;
f[b][a]++;
if (f[a][b] == fix[a]*fix[b]){
cout << "YES" << endl;
if (fix[a] >= fix[b])
swap(a, b);
col (a, b);
}
else
cout << "NO" << endl;
}
Compilation message (stderr)
game.cpp: In function 'int hasEdge(int, int)':
game.cpp:49:1: warning: no return statement in function returning non-void [-Wreturn-type]
}
^
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