제출 #480206

#제출 시각아이디문제언어결과실행 시간메모리
480206mohamedsobhi777PIN (CEOI10_pin)C++14
25 / 100
1099 ms6732 KiB
#include <bits/stdc++.h> using namespace std; const int N = 2e5 + 7; int n, d; long long ans ; string st[N] ; int main() { ios_base::sync_with_stdio(0); cin.tie(0); #ifndef ONLINE_JUDGE #endif cin >> n >> d ; for(int i = 0 ;i < n; ++ i){ cin >> st[i] ; } for(int i = 0 ;i < n; ++ i ){ for(int j = 0 ;j < i ; ++ j){ int diff = 0 ; for(int k = 0 ; k < 4 ; ++ k){ diff += (st[i][k] != st[j][k]) ; } ans += (diff == d) ; } } cout << ans ; return 0; }
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