Submission #1030323

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030323		thinknoexit	Colors (BOI20_colors)	C++17	0 / 100	1 ms	344 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
bool ask(ll x) {
    cout << "? " << x << endl;
    cin >> x; return x;
}
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    ll n;
    cin >> n;
    ask(1);
    ll l = 1, r = n;
    while (l < r) {
        ll mid = (l + r) / 2;
        if (ask(mid + 1)) r = mid;
        else l = mid + 1;
        ask(1);
    }
    cout << "= " << l << endl;
    return 0;
}

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