Submission #642321

#	Time	Username	Problem	Language	Result	Execution time	Memory
642321		Erennedirlo	Guess the number (BOI20_guess)	C++17	0 / 100	2491 ms	208 KiB

Guess

#include <iostream>
using namespace std;

int main() {
  int N;
  cin >> N;
  N += 1;

  int left = 1, right = N;

  while (1) {
    int tmp = (right - left) / 2 + left;
    int ans;
    cout << "?"
         << " " << tmp << "\n";
    cout.flush();
    cin >> ans;
    if (ans == -1) {
      right = tmp;
    } else if (ans == 0) {
      cout << "= " << tmp << "\n";
      break;
    } else {
      left = tmp;
    }
  }

  return 0;
}

• Subtask 1: 0 / 29
• Subtask 2: 0 / 71