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Submission #466508

# Submission time Handle Problem Language Result Execution time Memory
466508 2021-08-19T13:59:32 Z vendx_greyback Colors (BOI20_colors) C++14
0 / 100
 1 ms 200 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) (x).begin(),(x).end()


int32_t main() {
	
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int n;
	cin>>n;
	
	int left = 1, right = n, query = n, outcome, last_asked = 2;
	cout<<"? 2"<<endl;
	cin>>outcome;
	
	while(left < right){
	    
	    cout<<"? "<<query<<endl;
	    cin>>outcome;
	    
	    if(outcome)
	        right = abs(query-last_asked);
	    
	    else
	        left = abs(query-last_asked) + 1;
	    
        int mid = left + (right-left)/2;
        last_asked = query;
        
        if(query + mid <= n){
            query = query + mid;
        }
            
        else if(query - mid >= 1){
            query = query - mid;
        }
        
        else{
            query = 1;
        }
        
	}
	
	cout<<"= "<<right<<'\n';

	return 0;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Incorrect 0 ms 200 KB Hair color 1 was used multiple times
3 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Incorrect 0 ms 200 KB Hair color 1 was used multiple times
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Incorrect 0 ms 200 KB Hair color 1 was used multiple times
3 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Incorrect 0 ms 200 KB Hair color 1 was used multiple times
3 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB OK (5 queries)
2 Incorrect 0 ms 200 KB Hair color 1 was used multiple times
3 Halted 0 ms 0 KB -