Submission #378267

#	Time	Username	Problem	Language	Result	Execution time	Memory
378267		negar_a	Genetics (BOI18_genetics)	C++14	100 / 100	385 ms	19948 KiB

genetics

//!yrt tsuj uoy srettam gnihton no emoc
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
#define pb push_back
#define mp make_pair
#define pii pair <int, int>
#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define F first
#define S second

mt19937 Rnd(time(0));
const int maxn = 4100 + 5;
int n, m, k;
ll id[maxn], sm[maxn][5];
ll base = 31;
string s[maxn];

int main(){
	fast_io;
	cin >> n >> m >> k;
	ll tot = 0;
	ll x = 1;
	for(int i = 0; i < n; i ++){
		cin >> s[i];
		id[i] = x;
		x *= base;
		for(int j = 0; j < m; j ++){
			if(s[i][j] == 'A'){
				sm[j][0] += id[i];
				s[i][j] = '0';
			}
			else if(s[i][j] == 'C'){
				sm[j][1] += id[i];
				s[i][j] = '1';
			}
			else if(s[i][j] == 'T'){
				sm[j][2] += id[i];
				s[i][j] = '2';
			}
			else if(s[i][j] == 'G'){
				sm[j][3] += id[i];
				s[i][j] = '3';
			}
		}
		tot += id[i];
	}
	for(int i = 0; i < n; i ++){
		ll sum = 0;
		for(int j = 0; j < m; j ++){
			int c = s[i][j] - '0';
//			cout << "c : " << c << endl;
			for(int t = 0; t < 4; t ++){
				if(c != t){
					sum += sm[j][t];
				}
			}
		}
//		cout << i << " " << sum << " | " << (tot - id[i]) * k << endl;
		if((tot - id[i]) * k == sum){
			cout << i + 1;
			return 0;
		}
	}
	
	return 0;
}

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