oj.uz

Submission #940818

# Submission time Handle Problem Language Result Execution time Memory
940818 2024-03-07T16:47:25 Z LucaIlie Colors (BOI20_colors) C++17
0 / 100
 0 ms 344 KB 
#include <bits/stdc++.h>

using namespace std;

set<int> unused;
int query( long long c ) {
    unused.erase( c );
    cout << "? " << c << endl;
    int ans;
    cin >> ans;
    return ans;
}

void answer( long long c ) {
    cout << "= " << c << endl;
}

int main() {
    long long n;

    cin >> n;

    for ( int i = 1; i <= 400; i++ )
        unused.insert( i );

    long long l = 0, r = n;
    while ( r - l > 1 ) {
        long long c = (l + r) / 2;

        int x = *unused.begin();
        query( x );
        if ( query( c + x ) )
            r = c;
        else
            l = c;
    }

    answer( r );

    return 0;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Hair color 7 was used multiple times
2 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Hair color 7 was used multiple times
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Hair color 7 was used multiple times
2 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Hair color 7 was used multiple times
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Hair color 7 was used multiple times
2 Halted 0 ms 0 KB -