Submission #753494

#	Time	Username	Problem	Language	Result	Execution time	Memory
753494		amirrezashams	Guess the number (BOI20_guess)	C++14	0 / 100	2496 ms	284 KiB

Guess

#include <iostream>

using namespace std;

int main()
{
    int a;
    cin >> a;
    int start = 1;
    int end = a;
    while(true)
    {
        int mid = (end+start)/2;
        cout << "? "<<mid<<endl;
        int r;
        cin >> r;
        if(r==0)
        {
            cout << "= "<<mid<<endl;
            break;
        }
        if(r==1)
            end = mid;
        if(r==-1)
            start = mid;
    }
}

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