Submission #805067

#	Time	Username	Problem	Language	Result	Execution time	Memory
805067		oviyan_gandhi	Colors (BOI20_colors)	C++14	0 / 100	1 ms	208 KiB

Colors

#include <bits/stdc++.h>
typedef long long int ll;
using namespace std;

int main(){
    ll n; cin >> n;
    cout << "? 1" << endl;
    bool noticed;
    cin >> noticed;
    ll l = 1, r = n;
    while (l <= r){
        ll mid = l + (r-l)/2;
        cout << "? " << (int)(l + ceil((r-l)/2.0)) << endl;
        cin >> noticed;
        if (noticed) r = mid-1;
        else l = mid+1;
    }
    cout << "= " << (r+1) << endl;
    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33