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답안 #659990

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
659990 2022-11-20T07:33:30 Z jamezzz Colors (BOI20_colors) C++17
0 / 100
 1 ms 208 KB 
#include <bits/stdc++.h>
using namespace std;

#define sf scanf
#define pf printf
#define pb push_back
typedef long long ll;

int ask(ll x){
	cout<<"? "<<x<<endl;
	fflush(stdout);
	int a;cin>>a;
	return a;
}

void ans(ll x){
	cout<<"= "<<x<<endl;
	exit(0);
}

int main(){
	ll n;cin>>n;
	ll lo=1,hi=n,mid,res=-1;
	vector<ll> v;
	while(lo<=hi){
		mid=(lo+hi)>>1;
		v.pb(mid);
		lo=mid+1;
	}
	ll cur=1;int m=1;
	for(int i=v.size()-1;i>=0;--i){
		cur+=m*v[i];
		m=-m;
	}
	ask(cur);
	lo=1,hi=n;
	while(lo<=hi){
		if(lo==hi&&res==-1){
			res=lo;
			break;
		}
		mid=(lo+hi)>>1;
		cur+=m*mid;
		m=-m;
		if(ask(cur)==1)res=mid,hi=mid-1;
		else lo=mid+1;
	}
	ans(res);
}

Subtask #1
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 208 KB OK (4 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (4 queries)
4 Correct 1 ms 208 KB OK (5 queries)
5 Correct 0 ms 208 KB OK (6 queries)
6 Correct 0 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Runtime error 1 ms 208 KB Execution killed with signal 13
9 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 208 KB OK (4 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (4 queries)
4 Correct 1 ms 208 KB OK (5 queries)
5 Correct 0 ms 208 KB OK (6 queries)
6 Correct 0 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Runtime error 1 ms 208 KB Execution killed with signal 13
9 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 208 KB OK (4 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (4 queries)
4 Correct 1 ms 208 KB OK (5 queries)
5 Correct 0 ms 208 KB OK (6 queries)
6 Correct 0 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Runtime error 1 ms 208 KB Execution killed with signal 13
9 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 208 KB OK (4 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (4 queries)
4 Correct 1 ms 208 KB OK (5 queries)
5 Correct 0 ms 208 KB OK (6 queries)
6 Correct 0 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Runtime error 1 ms 208 KB Execution killed with signal 13
9 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 208 KB OK (4 queries)
2 Correct 0 ms 208 KB OK (7 queries)
3 Correct 1 ms 208 KB OK (4 queries)
4 Correct 1 ms 208 KB OK (5 queries)
5 Correct 0 ms 208 KB OK (6 queries)
6 Correct 0 ms 208 KB OK (7 queries)
7 Correct 0 ms 208 KB OK (7 queries)
8 Runtime error 1 ms 208 KB Execution killed with signal 13
9 Halted 0 ms 0 KB -