Submission #1276158

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276158		not_amir	Genetics (BOI18_genetics)	C++20	46 / 100	2093 ms	20376 KiB

genetics

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

int dtoi(char c) {
    if (c == 'A')
        return 0;
    if (c == 'G')
        return 1;
    if (c == 'C')
        return 2;
    if (c == 'T')
        return 3;
    exit(-1);
}

char itod(int x) {
    return "AGCT"[x];
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m, k;
    cin >> n >> m >> k;
    vector<string> C(n);
    vector<vector<int>> cnt(m, vector<int>(4));
    for (string &s : C) {
        cin >> s;
        for (int i = 0; i < m; i++)
            cnt[i][dtoi(s[i])]++;
    }
    random_device rd;
    mt19937_64 g(rd());
    vector<int> p(n);
    iota(p.begin(), p.end(), 0);
    shuffle(p.begin(), p.end(), g);
    auto ok = [&](int i) {
        for (int j : p) {
            if (j == i)
                continue;
            int s = 0;
            for (int l = 0; s <= k && l < m; l++) {
                s += (C[i][l] != C[j][l]);
            }
            if (s != k)
                return false;
        }
        return true;
    };
    for (int i : p) {
        int s = 0;
        for (int j = 0; s <= (n - 1) * k && j < m; j++) {
            for (int l = 0; l < 4; l++) {
                if (l != dtoi(C[i][j]))
                    s += cnt[j][l];
            }
        }
        if (s != (n - 1) * k)
            continue;
        if (ok(i)) {
            cout << i + 1;
            return 0;
        }
    }
    cout << -1;
}

• Subtask 1: 27 / 27
• Subtask 2: 19 / 19
• Subtask 3: 0 / 28
• Subtask 4: 0 / 26