Submission #969101

#	Time	Username	Problem	Language	Result	Execution time	Memory
969101		__Davit__	Cave (IOI13_cave)	C++17	100 / 100	504 ms	600 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>

using namespace std;

//
//void answer(int S[], int D[], int N) {
//    for (int i = 0; i < N; i++)cout << S[i] << " ";
//    cout << endl;
//    for (int i = 0; i < N; i++)cout << D[i] << " ";
//    cout << endl;
//}
//
//int tryCombination(int S[], int N) {
//    cout << "! ";
//    for (int i = 0; i < N; i++)cout << S[i] << " ";
//    cout << endl;
//    int x;
//    cin >> x;
//    return x;
//}

//
void exploreCave(int N) {
    int a[N];
    int b[N];
    for (int i = 0; i < N; i++)a[i] = 0;
    for (int i = 0; i < N; i++)b[i] = -1;
    int x;
    for (int i = 0; i < N; i++) {
//        x = tryCombination(a, N);
        x = tryCombination(a);
        if (x == i) {
            for (int j = 0; j < N; j++) {
                if (b[j] == -1) a[j] ^= 1;
            }
        }
        int ina = 0, inb = N - 1, ans = N - 1;
        while (ina <= inb) {
            int mid = (ina + inb) >> 1;
            for (int j = 0; j <= mid; j++) {
                if (b[j] == -1) a[j] ^= 1;
            }
//            x = tryCombination(a, N);
            x = tryCombination(a);
            for (int j = 0; j <= mid; j++) {
                if (b[j] == -1) a[j] ^= 1;
            }
            if (x == i) {
                ans = mid;
                inb = mid - 1;
            } else {
                ina = mid + 1;
            }
        }
        b[ans] = i;
    }

//    answer(a, b, N);
    answer(a, b);
}

//int main() {
//    exploreCave(4);
//}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24