Submission #1266559

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266559		raphaelp	Guess the number (BOI20_guess)	C++20	100 / 100	0 ms	408 KiB

Guess

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int N;
    cin >> N;
    int L = 1, R = N + 1;
    while (L + 1 != R)
    {
        int m = (L + R) / 2;
        cout << "? " << m << endl;
        int ans;
        cin >> ans;
        if (ans == 1)
            R = m;
        else
            L = m;
    }
    cout << "= " << L << endl;
}

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