Submission #784157

#	Time	Username	Problem	Language	Result	Execution time	Memory
784157		raysh07	Genetics (BOI18_genetics)	C++17	19 / 100	2016 ms	16600 KiB

genetics

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

const int N = 4105;
bitset <N> bs[N];

void Solve()
{
	int n, m, k; cin >> n >> m >> k;
	
	for (int i = 0; i < n; i++){
		string s; cin >> s;

		for (int j = 0; j < m; j++){
			if (s[j] == 'A') bs[i].set(j);
		}
	}

	vector <int> perm;
	for (int i = 0; i < n; i++) perm.push_back(i);
	srand(69);
	random_shuffle(perm.begin(), perm.end());

	for (auto x : perm){
		bool good = true;
		for (int i = 0; i < n; i++) if (i != x){
			good &= (bs[i] ^ bs[x]).count() == k;
			if (!good) break;
		}

		if (good){
			cout << x + 1 << "\n";
			return;
		}
	}
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;

   // freopen("in",  "r", stdin);
   // freopen("out", "w", stdout);

  //  cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

Compilation message (stderr)

genetics.cpp: In function 'void Solve()':
genetics.cpp:31:36: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   31 |    good &= (bs[i] ^ bs[x]).count() == k;
      |            ~~~~~~~~~~~~~~~~~~~~~~~~^~~~

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