Submission #121014

#	Time	Username	Problem	Language	Result	Execution time	Memory
121014		IOrtroiii	Genetics (BOI18_genetics)	C++14	100 / 100	394 ms	21368 KiB

genetics

#include <bits/stdc++.h>
using namespace std;

const int N = 4107;

int n, m, k;
string s[N];
long long x[N];
long long f[N][4];
long long g[N];
long long X = 0;

int type(char c) {
    if (c == 'A') return 0;
    if (c == 'C') return 1;
    if (c == 'G') return 2;
    return 3;
}

int main() {
    srand(time(NULL));
    ios_base::sync_with_stdio(false);
    cin >> n >> m >> k;
    for (int i = 0; i < n; ++i) {
        cin >> s[i];
        x[i] = rand();
        X += x[i];
        for (int j = 0; j < m; ++j) f[j][type(s[i][j])] += x[i];
    }
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            int t = type(s[i][j]);
            for (int tt = 0; tt < 4; ++tt) {
                if (tt != t) g[i] += f[j][tt];
            }
        }
        if (g[i] == k * (X - x[i])) return cout << i + 1 << '\n',0;
    }
}

• Subtask 1: 27 / 27
• Subtask 2: 19 / 19
• Subtask 3: 28 / 28
• Subtask 4: 26 / 26