Submission #166878

#	Time	Username	Problem	Language	Result	Execution time	Memory
166878		Eae02	Genetics (BOI18_genetics)	C++14	0 / 100	299 ms	1400 KiB

genetics

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;

bitset<4101> dna[4101];

int diff[4101][4101];

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	
	int n, m, k;
	cin >> n >> m >> k;
	
	vector<int> permN(n);
	iota(permN.begin(), permN.end(), 0);
	random_shuffle(permN.begin(), permN.end());
	
	vector<int> permM(m);
	iota(permM.begin(), permM.end(), 0);
	random_shuffle(permM.begin(), permM.end());
	
	for (int i = 0; i < n; i++) {
		string ln; cin >> ln;
		for (int j = 0; j < m; j++) {
			if (ln[j] == 'A')
				dna[permN[i]].set(permM[j]);
		}
	}
	
	vector<bool> cand(n, true);
	
	int ans;
	for (int a = 0; a < n; a++) {
		if (!cand[a])
			continue;
		bool ok = true;
		for (int b = a + 1; b < n; b++) {
			if (a != b && (dna[a] ^ dna[b]).count() != k) {
				ok = false;
				cand[b] = false;
			}
		}
		if (ok) {
			ans = a;
			break;
		}
	}
	
	cout << (find(permN.begin(), permN.end(), ans) - permN.begin() + 1) << "\n";
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:40:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (a != b && (dna[a] ^ dna[b]).count() != k) {
                  ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~

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