Submission #1161869

#	Time	Username	Problem	Language	Result	Execution time	Memory
1161869		dolphy	Colors (BOI20_colors)	C++20	0 / 100	0 ms	432 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb(a) push_back(a)
#define pp pop_back
#define mp(a, b) make_pair(a, b)
int32_t main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n;
    cin >> n;
    bool b=0;
    int l=1, r=n, x=(n+2)/3, y, a;
    cout << "? " << x << "\n" << flush;
    cin >> a;
    while (l<r) {
        if (!b) y=x+(l+r+1)/2;
        else y=x-(l+r+1)/2;
        cout << "? " << y << "\n" << flush;
        cin >> a;
        if (!a) l=abs(y-x)+1;
        else r=abs(y-x);
        b=1-b;
        x=y;
    }
    cout << l << "\n";
    return 0;
}

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