algorithm/bitset.cpp at main · CAEL0/algorithm · GitHub

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// BOJ 20501 Facebook

#include<bits/stdc++.h>
#defineszsize()
#definebkback()
#definefi first
#definese second

usingnamespacestd;
typedeflonglong ll;
typedef pair<int, int> pii;

intmain() {
ios::sync_with_stdio(0);
 cin.tie(0);
 cout.tie(0);

int n;
 cin >> n;

 vector<bitset<2000>> v(n);
for (int i = 0; i < n; i++) {
 string s;
 cin >> s;

 v[i] = bitset<2000>(s);
 }

int q;
 cin >> q;

while (q--) {
int x, y;
 cin >> x >> y;

 cout << (v[x - 1] & v[y - 1]).count() << '\n';
 }
}