Submission #636388

#	Time	Username	Problem	Language	Result	Execution time	Memory
636388		TranGiaHuy1508	Genetics (BOI18_genetics)	C++17	46 / 100	2053 ms	29344 KiB

genetics

/*
	Unknown's C++ Template (v3.2)
*/

#include "bits/stdc++.h"
using namespace std;

#define int long long

using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using vi = vector<int>;
using vii = vector<ii>;
using vvi = vector<vi>;
using vvii = vector<vii>;
template <class T> using maxpq = priority_queue<T>;
template <class T> using minpq = priority_queue<T, vector<T>, greater<T>>;

#define pb push_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mid ((l+r)>>1)
#define fi first
#define se second

#ifdef LOCAL
	#define debug(x) cout << #x << " = " << x << "\n";
#else
	#define debug(x) ;
#endif

template <class A, class B>
ostream& operator << (ostream& out, pair<A, B> x)
{ out << "(" << x.first << ", " << x.second << ")"; return out; }

template <class T>
ostream& operator << (ostream& out, vector<T> x){
	out << "[";
	for (int i=0; i<sz(x); i++) { out << (i ? ", " : "") << x[i]; }
	out << "]"; return out;
}

template <class T>
istream& operator >> (istream& in, vector<T> &x){
	for (auto &i: x) in >> i;
	return in;
}

const ld PI = acos(-1.0);
const int allmod[3] = {(int)1e9+7, 998244353, (int)1e9+9};
const int mod = allmod[0];
const int maxn = 4105;
const ll inf = 1e18;
const ld eps = 1e-6;
const int multitest = 0;

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

int dp[maxn][4];
string inp[maxn];
int n, m, k;

void main_program(){
	cin >> n >> m >> k;
	for (int i = 0; i < n; i++){
		string s; cin >> s;
		inp[i] = s;
		for (int j = 0; j < m; j++){
			int c;
			if (s[j] == 'A') c = 0;
			else if (s[j] == 'C') c = 1;
			else if (s[j] == 'T') c = 2;
			else c = 3;
			dp[j][c]++;
		}
	}

	vi cand;

	for (int i = 0; i < n; i++){
		int s = n * m;
		for (int j = 0; j < m; j++){
			int c;
			if (inp[i][j] == 'A') c = 0;
			else if (inp[i][j] == 'C') c = 1;
			else if (inp[i][j] == 'T') c = 2;
			else c = 3;
			s -= dp[j][c];
		}
		if (s == k * (n - 1)) cand.pb(i);
	}
	shuffle(all(cand), rng);
	debug(cand);

	for (int i = 0; i < sz(cand) - 1; i++){
		int idx = cand[i];
		bool valid = true;
		for (int j = 0; j < n; j++){
			if (j == idx) continue;
			int s = 0;
			for (int x = 0; x < m; x++){
				s += (inp[idx][x] != inp[j][x]);
			}
			if (s != k){
				valid = false;
				break;
			}
		}
		if (valid){
			cout << idx + 1 << "\n";
			return;
		}
	}
	cout << cand.back() + 1 << "\n";
}

void pre_main(){

}

signed main(){
	#ifdef LOCAL
		auto stime = chrono::high_resolution_clock::now();
	#endif
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	#ifndef ONLINE_JUDGE
		if (fopen(".inp", "r")){
			freopen(".inp", "r", stdin);
			freopen(".out", "w", stdout);
		}
	#endif
	int t = 1; if (multitest) cin >> t;
	pre_main();
	while (t--) main_program();
	#ifdef LOCAL
		auto etime = chrono::high_resolution_clock::now();
		auto duration = chrono::duration_cast<chrono::milliseconds>(etime-stime).count();
		cout << "\n[" << duration << "ms]\n";
	#endif
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:129:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  129 |    freopen(".inp", "r", stdin);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~
genetics.cpp:130:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  130 |    freopen(".out", "w", stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

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