oj.uz

Submission #502657

# Submission time Handle Problem Language Result Execution time Memory
502657 2022-01-06T11:51:32 Z srivatsav_kannan Colors (BOI20_colors) C++14
0 / 100
 0 ms 200 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <set>
#include <queue>
#include <cmath>
#include <map>
#include <algorithm>
#include <unordered_map>
using namespace std;
#define int long long int
signed main() {
    int n; cin >> n;
    if (n == 1){
        cout << 1 << endl;
        return 0;
    }
    int l = 1, r = n;
    int prev = n;
    int cur;
    while (l < r){
        int mid = (l+r)/2;
        if (l == r-1) mid = r;
        if (mid == n){
            cout << "? 1" << endl;
            cin >> cur;
            cout << "? " << n << endl;
            cin >> cur;
            if (cur){
                cout << "= " << n-1 << endl;
            } else {
                cout << " " << n << endl;
            }
            return 0;
        }
        cout << "? " << 1 << endl;
        cin >> cur;
        cout << "? " << 1+mid << endl;
        cin >> cur;
        prev += mid;
        if (cur){
            if  (l == r){
                cout << "= " << l << endl;
                break;
            }
            if (l == r-1){
                cout << "= " << r << endl;
                break;
            }
            l = mid;
        } else {
            r = mid-1;
            if (l == r-1){
                cout << "= " << l << endl;
                break;
            }
        }
    }
    return 0;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 200 KB Hair color 1 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 200 KB Hair color 1 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 200 KB Hair color 1 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 200 KB Hair color 1 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 200 KB Hair color 1 was used multiple times
2 Halted 0 ms 0 KB -