oj.uz

Submission #948963

# Submission time Handle Problem Language Result Execution time Memory
948963 2024-03-18T17:40:53 Z LucaIlie Colors (BOI20_colors) C++17
0 / 100
 0 ms 432 KB 
#include <bits/stdc++.h>

using namespace std;

/*const int C = 4;

int prv = 0;
bool query( long long c ) {
    cout << "? " << c << endl;
    bool ans = (abs( prv - c ) >= C);
    prv = c;
    return ans;
}*/

bool query( long long c ) {
    cout << "? " << c << endl;
    bool ans;
    cin >> ans;
    return ans;
}

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

int main() {
    long long n;

    cin >> n;

    query( n / 2 );
    int l = n / 2, c = 0;
    for ( int k = log2( n ); k >= 0; k-- ) {
        if ( c + (1 << k) >= n )
            continue;
        if ( l > n / 2 ) {
            l -= c + (1 << k);
            if ( !query( l ) )
                c += (1 << k);
        } else {
            l += c + (1 << k);
            if ( !query( l ) )
                c += (1 << k);
        }
    }

    answer( c + 1 );

    return 0;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Runtime error 0 ms 432 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Runtime error 0 ms 432 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Runtime error 0 ms 432 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Runtime error 0 ms 432 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Runtime error 0 ms 432 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -