oj.uz

Submission #685824

# Submission time Handle Problem Language Result Execution time Memory
685824 2023-01-25T01:47:54 Z null_awe Guess the number (BOI20_guess) C++14
0 / 100
 0 ms 208 KB 
#include <iostream>
using namespace std;

int qry(int x) {
  cout << "? " << x << endl;
  int ans; cin >> ans;
  return ans;
}

int main() {
  int n; cin >> n;
  int lo = 0, hi = n + 1;
  while (lo < hi - 1) {
    int mid = (lo + hi) >> 1;
    int ans = qry(mid);
    if (ans < 0) hi = mid;
    else lo = mid;
    if (!ans) break;
  }
  cout << "= " << lo << endl;
  return 0;
}

Subtask #1
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Wrong guess
2 Halted 0 ms 0 KB -

Subtask #2
0 / 71.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Wrong guess
2 Halted 0 ms 0 KB -