Submission #951096

#	Time	Username	Problem	Language	Result	Execution time	Memory
951096		koukirocks	Colors (BOI20_colors)	C++17	9 / 100	1 ms	596 KiB

Colors

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
 
using namespace std;
typedef long long ll;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=998244353;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;

int n;

int main() {
	speed;
	cin>>n;
	if (n<=64) {
		int now=1;
		int x;
		cout<<"? 1\n"<<flush;
		cin>>x;
		for (int i=1;i<n;i++) {
			now+=(i&1?1:-1)*(n-i);
			cout<<"? "<<now<<"\n"<<flush;
			cin>>x;
			if (x==0) {
				cout<<"= "<<(n-i+1)<<"\n"<<flush;
				return 0;
			}
		}
		cout<<"= 1\n"<<flush;
	}
	return 0;
}

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