Submission #677320

#	Time	Username	Problem	Language	Result	Execution time	Memory
677320		Lobo	Genetics (BOI18_genetics)	C++17	100 / 100	263 ms	91308 KiB

genetics

#include<bits/stdc++.h>
using namespace std;
const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
// #define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
const int maxn = 4140;
mt19937 rng(143243);
int ran(int a, int b) {
    return a + rng()%(b-a+1);
}

int n, m, k, a[maxn][maxn], cntcol[maxn][5], cntper[maxn][5], sumcol[maxn][5], w[maxn];
string s[maxn];

void solve() {
    cin >> n >> m >> k;
    for(int i = 1; i <= n; i++) {
        cin >> s[i];
        w[i] = ran(5,inf1);
        for(int j = 0; j < m; j++) {
            if(s[i][j] == 'A') a[i][j] = 0;
            if(s[i][j] == 'C') a[i][j] = 1;
            if(s[i][j] == 'G') a[i][j] = 2;
            if(s[i][j] == 'T') a[i][j] = 3;
            cntper[i][a[i][j]]++;
            cntcol[j][a[i][j]]++;
            sumcol[j][a[i][j]]+= w[i];
        }
    }

    for(int i = 1; i <= n; i++) {
        int sumop = 0;
        for(int j = 0; j < m; j++) {
            sumop+= sumcol[j][0]+sumcol[j][1]+sumcol[j][2]+sumcol[j][3]-sumcol[j][a[i][j]];
        }

        int sumw = 0;
        for(int j = 1; j <= n; j++) {
            if(i == j) continue;
            sumw+= k*w[j];
        }

        if(sumw == sumop) {
            cout << i << endl;
            return;
        }
    }

}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }

}

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