제출 #1332860

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1332860		mamabear	Dark Ride (EGOI25_darkride)	C++20	100 / 100	2 ms	468 KiB

Main

#include <iostream>
#include <string>

using namespace std;

int ask(const string& s) {
    cout << "? " << s << endl;
    
    int screams;
    cin >> screams;
    return screams;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n;
    if (!(cin >> n)) return 0; 

    int D = 0; 
    
    for (int k = 0; k < 15; ++k) {
        string s(n, '0');
        
        for (int i = 0; i < n; ++i) {
            if ((i >> k) & 1) {
                s[i] = '1';
            }
        }
        
        int screams = ask(s);
        
        if (screams % 2 != 0) {
            D |= (1 << k);
        }
    }

    int p = -1;
    for (int k = 0; k < 15; ++k) {
        if ((D >> k) & 1) {
            p = k;
            break;
        }
    }

    int A = (1 << p);
    
    for (int j = 0; j < 15; ++j) {
        if (j == p) continue;
        
        string s(n, '0');
        for (int i = 0; i < n; ++i) {
            if (((i >> p) & 1) && ((i >> j) & 1)) {
                s[i] = '1';
            }
        }
        
        int screams = ask(s);
        
        if (screams % 2 != 0) {
            A |= (1 << j);
        }
    }

    int B = A ^ D;
    cout << "! " << A << " " << B << endl;

    return 0;
}

• Subtask 1: 0 / 0
• Subtask 2: 9 / 9
• Subtask 3: 15 / 15
• Subtask 4: 17 / 17
• Subtask 5: 16 / 16
• Subtask 6: 14 / 14
• Subtask 7: 29 / 29