Submission #693015

#	Time	Username	Problem	Language	Result	Execution time	Memory
693015		MilosMilutinovic	Genetics (BOI18_genetics)	C++17	100 / 100	772 ms	36184 KiB

genetics

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m, k;
  cin >> n >> m >> k;
  vector<string> s(n);
  for (int i = 0; i < n; i++) {
    cin >> s[i];
  }
  mt19937 rng(time(0));
  vector<int> val(n);
  for (int i = 0; i < n; i++) {
    val[i] = rng() % (int) 1e9;
  }
  auto Id = [&](char c) {
    if (c == 'A') return 0;
    if (c == 'G') return 1;
    if (c == 'C') return 2;
    if (c == 'T') return 3;
  };
  vector<long long> d(n);
  for (int j = 0; j < m; j++) {
    vector<long long> f(4);
    for (int i = 0; i < n; i++) {
      f[Id(s[i][j])] += val[i];
    }
    for (int i = 0; i < n; i++) {
      for (int k = 0; k < 4; k++) {
        if (Id(s[i][j]) != k) {
          d[i] += f[k];
        }
      }
    }
  }
  long long sum = 0;
  for (int i = 0; i < n; i++) {
    sum += val[i];
  }
  for (int i = 0; i < n; i++) {
    if (d[i] == (sum - val[i]) * k) {
      cout << i + 1 << '\n';
      return 0;
    }
  }
  return 0;
}

Compilation message (stderr)

genetics.cpp: In lambda function:
genetics.cpp:24:3: warning: control reaches end of non-void function [-Wreturn-type]
   24 |   };
      |   ^

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