Submission #509762

#	Time	Username	Problem	Language	Result	Execution time	Memory
509762		tht2005	Guess the number (BOI20_guess)	C++14	0 / 100	0 ms	200 KiB

Guess

#include <bits/stdc++.h>
 
using namespace std;
 
int main() {
  	ios::sync_with_stdio(false);
  	cin.tie(NULL); cout.tie(NULL);
    int l = 1, r;
    cin >> r;
    while(l <= r) {
        int m = (l + r) >> 1;
        cout << '?' << ' ' << m << endl;
        int x;
        cin >> x;
        if(!x) {
            cout << '=' << ' ' << m << endl;
            break;
        }
        if(x < 0) r = m - 1;
        else l = m + 1;
    }
    return 0;
}

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