Submission #524665

#	Time	Username	Problem	Language	Result	Execution time	Memory
524665		Yazan_Alattar	Genetics (BOI18_genetics)	C++14	100 / 100	671 ms	164932 KiB

genetics

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 5007;
const ll inf = 1e18;
const ll mod = 998244353;
const double pi = acos(-1);
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};

int to(char x)
{
	if(x == 'A') return 0;
	if(x == 'C') return 1;
	if(x == 'G') return 2;
	return 3;
}

ll n, m, k, a[M][M], cnt[M][4], w[M], tot;

int main()
{
	cin >> n >> m >> k;
	for(int i = 1; i <= n; ++i){
		string s; cin >> s;
		w[i] = rand();
		tot += w[i];
		for(int j = 1; j <= m; ++j){
			a[i][j] = to(s[j - 1]);
			cnt[j][a[i][j]] += w[i];
		}
	}
	for(int i = 1; i <= n; ++i){
		ll sum = 0;
		for(int j = 1; j <= m; ++j)	sum += tot - cnt[j][a[i][j]];
		if(sum == (tot - w[i]) * k) cout << i << endl, exit(0);
	}
	return 0;
}

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