Submission #959996

#	Time	Username	Problem	Language	Result	Execution time	Memory
959996		mannshah1211	Colors (BOI20_colors)	C++17	0 / 100	0 ms	344 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n;
  cin >> n;
  auto question = [&](int col) {
    cout << "? " << col << '\n';
    fflush(stdout);
    int x;
    cin >> x;
    fflush(stdout);
    return x;
  };
  auto output = [&](int col) {
    cout << "= " << col << '\n';
    fflush(stdout);
  };
  question(1);
  int lo = 0, hi = n - 1, ind = -1;
  while (lo <= hi) {
    int mid = (lo + hi) / 2;
    question(1);
    if (question(mid + 1)) {
      ind = mid;
      lo = mid + 1;
    } else {
      hi = mid - 1;
    }
  }
  if (ind == -1) {
    output(n);
  } else {
    output(ind);
  }
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33