Submission #96037

#	Time	Username	Problem	Language	Result	Execution time	Memory
96037		caesar2001	Genetics (BOI18_genetics)	C++14	46 / 100	2033 ms	796804 KiB

genetics

#include <bits/stdc++.h>
#define ll long long
#define lsb(x) (x & -x)

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    //freopen("a.in", "r", stdin);
    //freopen("a.out", "w", stdout);

    int n, m, k;
    cin >> n >> m >> k;
    k = m - k;

    vector<int> code(30, 0);
    code['A' - 'A'] = 1;
    code['C' - 'A'] = 2;
    code['G' - 'A'] = 3;
    code['T' - 'A'] = 4;

    vector<vector<vector<ll>>> v(5, vector<vector<ll>> (n + 1, vector<ll> (m + 1, 0)));
    for(int i = 1; i <= n; i ++) {
        string s;
        cin >> s;

        for(int j = 0; j < m; j ++)
            v[code[s[j] - 'A']][i][j + 1] = 1;
    }

    srand(time(NULL));

    vector<ll> hs(n + 1, 0);
    for(int i = 1; i <= n; i ++)
        hs[i] = rand();

    vector<ll> ans(n + 1, 0);
    vector<ll> ths(m + 1, 0);
    for(int color = 1; color <= 4; color ++) {
        for(int i = 1; i <= m; i ++)
            ths[i] = 0;
        for(int i = 1; i <= m; i ++)
            for(int k = 1; k <= n; k ++)
                ths[i] += (v[color][k][i] * hs[k]);

        for(int i = 1; i <= n; i ++)
            for(int k = 1; k <= m; k ++)
                ans[i] += (v[color][i][k] * ths[k]);
    }

    vector<ll> solhs(n + 1, 0);
    for(int i = 1; i <= n; i ++) {
        for(int j = 1; j <= n; j ++) {
            if(i == j)
                solhs[i] += (m * hs[j]);
            else
                solhs[i] += (k * hs[j]);
        }
    }

    for(int i = 1; i <= n; i ++) {
        if(solhs[i] == ans[i]) {
            cout << i;
            return 0;
        }
    }

    return 0;
}

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