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Submission #680505

# Submission time Handle Problem Language Result Execution time Memory
680505 2023-01-11T02:17:33 Z jhwest2 Colors (BOI20_colors) C++17
0 / 100
 0 ms 208 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
ll n;

bool ask(ll n) {
    bool res; 
    cout << "? " << n << endl;
    cin >> res;
    return res;
}
int main() {
    cin >> n;

    ll L = 1, R = n;
    ll x = n / 3, dir = 0;
    ask(x);
    while (L < R) {
        ll M = (L + R + 1) / 2;

        bool r;
        if (dir == 0) {
            r = ask(x + M);
            x += M;
        }
        else {
            r = ask(x - M);
            x -= M;
        }
        dir = 1 - dir;
        
        if (r)
            R = M;
        else
            L = M + 1;
    }
    cout << "= " << L << endl;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB OK (3 queries)
2 Runtime error 0 ms 208 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 208 KB OK (3 queries)
2 Runtime error 0 ms 208 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 208 KB OK (3 queries)
2 Runtime error 0 ms 208 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 208 KB OK (3 queries)
2 Runtime error 0 ms 208 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 208 KB OK (3 queries)
2 Runtime error 0 ms 208 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -