Submission #878224

#	Time	Username	Problem	Language	Result	Execution time	Memory
878224		vjudge1	Genetics (BOI18_genetics)	C++17	74 / 100	2050 ms	27724 KiB

genetics

/// I'm only brave when I have to be
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define fast_io ios::sync_with_stdio(false);cin.tie(NULL);
#define file_io freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);
#define FOR(i,k,n) for(int i = k; i < n; ++ i)
#define debf cout<<"(0-0)\n";
#define all(x) x.begin(), x.end()
#define dec(x) cout << fixed << setprecision(x);
#define pf push_front
#define ppf pop_front
#define dash " ------- "
#define what(x) cerr << #x << " is " << x << endl;
#define eb emplace_back
//#define int short int
//#define int long long
#define sz(s) (int) (s.size())
#define fl cout.flush()

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;
typedef unsigned long long ull;
typedef long double ld;

template <class T> using max_heap = priority_queue <T, vector <T>, less <T> >;
template <class T> using min_heap = priority_queue <T, vector <T>, greater <T> >;

constexpr int MOD = 1e9 + 7, N = 4108, M = 1e9, SQ = 300, INF = 1e9 + 8, LGN = 22, mod = 998244353, P = 131113;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

bitset <N> t;
bitset <N> b[N];
bool fir;
int n, m, k;
char s[N][N];

int32_t main(){
  fast_io;
  cin >> n >> m >> k;
  for (int i = 0; i < n; ++ i){
    cin >> s[i];
    for (int j = 0; j < m; ++ j){
      if (s[i][j] == 'T' || s[i][j] == 'G'){
        fir = true;
      }
      else {
        if (s[i][j] == 'C'){
          b[i][j] = true;
        }
        else {
          b[i][j] = false;
        }
      }
    }
  }
  if (fir){
    for (int i = 0; i < n; ++ i){
      int tmp = 0;
      for (int j = 0; j < n; ++ j){
        if (j != i){
          int cnt = 0;
          for (int o = 0; o < m; ++ o){
            cnt += (s[i][o] != s[j][o]);
          }
          if (cnt == k){
            ++ tmp;
          }
        }
      }
      if (tmp == n - 1){
        cout << i + 1 << '\n';
        return 0;
      }
    }
  }
  for (int i = 0; i < n; ++ i){
    int tmp = 0;
    for (int j = 0; j < n; ++ j){
      if (i != j){
        t = b[i] ^ b[j];
        if (t.count() == k){
          ++ tmp;
        }
      }
    }
    if (tmp == n - 1){
      cout << i + 1 << '\n';
      return 0;
    }
  }
  return 0;
}
// Yesterday is history
// Tomorrow is a mystery
// but today is a gift
// That is why it is called the present

Compilation message (stderr)

genetics.cpp: In function 'int32_t main()':
genetics.cpp:93:23: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   93 |         if (t.count() == k){
      |             ~~~~~~~~~~^~~~

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