Submission #878176

#	Time	Username	Problem	Language	Result	Execution time	Memory
878176		vjudge1	Genetics (BOI18_genetics)	C++17	27 / 100	2055 ms	10216 KiB

genetics

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

#define ll long long 
#define pb push_back

// #pragma GCC optimize("Ofast,unroll-loops")
// #pragma GCC target("avx2")

const int N = 4100 + 4;

int n, m, k, idx[N];
string s[N];
bitset<N << 2> tmp, b[N];

mt19937 rng(time(0));

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> m >> k;
    for (int i = 0; i < n; ++i) {
        cin >> s[i];
        idx[i] = i;
        for (int j = 0; j < m; ++j) {
            if (s[i][j] == 'A') {
                b[i][j] = true;
            }
            else if (s[i][j] == 'G') {
                b[i][j + m] = true;
            }
            else if (s[i][j] == 'C') {
                b[i][j + 2 * m] = true;
            }
            else if (s[i][j] == 'T') {
                b[i][j + 3 * m] = true;
            }
        }
    }

    shuffle(idx, idx + n, rng);

    for (int _ = 0; _ < n; ++_) {
        int i = idx[_];
        bool ok = true;

        for (int j = 0; j < n; ++j) {
            if (i == j) {
                continue;
            }
            if ((b[i] ^ b[j]).count() != (k << 1)) {
                ok = false;
            }
        }
        if (ok) {
            cout << i + 1;
            return 0;
        }
    }

    return 0;
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:52:39: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   52 |             if ((b[i] ^ b[j]).count() != (k << 1)) {
      |                 ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~

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