Submission #320185

#	Time	Username	Problem	Language	Result	Execution time	Memory
320185		Karen124	PIN (CEOI10_pin)	C++14	15 / 100	1098 ms	16228 KiB

pin

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const ll N = 5e5 + 5;
const ll INF = 1e18 + 10;
int n, d, ans;
string a[N];
int f(string s1, string s2){
    int ret = 0;
    for (int i = 0; i < 4; i++){
        ret += (s1[i] != s2[i]);
    }
    return ret;
}
int main (){
    cin >> n >> d;
    for (int i = 0; i < n; i++){
        cin >> a[i];
        for (int j = 0; j < i; j++){
            ans += (f(a[i], a[j]) == d);
        }
    }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 15 / 100