Submission #677317

#	Time	Username	Problem	Language	Result	Execution time	Memory
677317		Lobo	Genetics (BOI18_genetics)	C++17	27 / 100	184 ms	19552 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];
string s[maxn];

void solve() {
    cin >> n >> m >> k;
    for(int i = 1; i <= n; i++) {
        cin >> s[i];
        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]]++;
        }
    }
    for(int i = 1; i <= n; i++) {
        int cntwrg = 0;
        for(int j = 0; j < m; j++) {
            cntwrg+= n-cntcol[j][a[i][j]];
        }
        bool ok = true;
        if(cntwrg != k*(n-1)) ok = false;
        // for(int j = 1; j <= n; j++) {
        //     if(i == j) continue;
        //     if(abs(cntper[i][0]-cntper[j][0])+abs(cntper[i][1]-cntper[j][1]) != 2*k) ok = false;
        //     cout << i << " " << j << " " << abs(cntper[i][0]-cntper[j][0])+abs(cntper[i][1]-cntper[j][1]) << endl;
        // }
        int rndtest = 6000;
        while(rndtest-- && ok) {
            int j = ran(1,n-1);
            if(j >= i) j++;
            int cnt = 0;
            for(int x = 0; x < m; x++) {
                if(a[i][x] != a[j][x]) cnt++;
            }
            if(cnt != k) {
                ok = false;
            }

        }
        if(ok) {
            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: 0 / 19
• Subtask 3: 0 / 28
• Subtask 4: 0 / 26