Submission #566240

#	Time	Username	Problem	Language	Result	Execution time	Memory
566240		two_sides	Genetics (BOI18_genetics)	C++17	27 / 100	2066 ms	4000 KiB

genetics

#include <bits/stdc++.h>

using namespace std;

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

const int N = 4005;

string s[N];
int n, m, k; 

int calc(int i, int j) {
    int res = 0;
    for (int x = 0; x < m; x++)
        res += s[i][x] != s[j][x];
    return res;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m >> k;
    vector<int> can;
    for (int i = 0; i < n; i++) {
        cin >> s[i];
        if (can.empty())
            can.push_back(i);
        else if (calc(can.back(), i) != k)
            can.pop_back();
        else can.push_back(i);
    }
    for (int i : can) {
        vector<int> ord(n);
        iota(ord.begin(), ord.end(), 0);
        shuffle(ord.begin(), ord.end(), rng);
        bool flag = true;
        for (int j : ord)
            if (i != j && calc(i, j) != k) {
                flag = false; break;
            }
        if (flag) return cout << i + 1, 0;
    }
}

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