Submission #923184

#	Time	Username	Problem	Language	Result	Execution time	Memory
923184		gawr_gura	Broken Device (JOI17_broken_device)	C++17	100 / 100	28 ms	2740 KiB

Anna

#include <bits/stdc++.h>

#include "Annalib.h"
using namespace std;

void Anna(int N, long long X, int K, int P[]) {
        vector<int> a(N);
        vector<int> wrong(N);
        for (int i = 0; i < K; i++) wrong[P[i]] = 1;
        for (int i = 0; i < N; i += 3) {
                int z = X % 4;
                if (wrong[i] + wrong[i + 1] + wrong[i + 2] == 0) {
                        X /= 4;
                        // cout << "? " << i << '\n';
                        if (z == 1) {
                                a[i + 2] = a[i + 1] = 1;
                        } else {
                                a[i] = 1;
                                a[i + 1] = z & 1;
                                a[i + 2] = z / 2;
                        }
                } else if (wrong[i] + wrong[i + 1] + wrong[i + 2] == 1) {
                        if (wrong[i]) {
                                if (z == 1) {
                                        a[i + 1] = a[i + 2] = 1;
                                        X /= 4;
                                } else {
                                        a[i + 1 + (z & 1)] = 1;
                                        X /= 2;
                                }
                        } else if (wrong[i + 1]) {
                                if (z % 2 == 0) {
                                        a[i] = 1;
                                        a[i + 2] = z / 2;
                                        X /= 4;
                                } else {
                                        a[i + 2] = 1;
                                        X /= 2;
                                }
                        } else {
                                if (z == 0) {
                                        a[i] = 1;
                                        X /= 4;
                                } else {
                                        a[i + 1] = 1;
                                        a[i] = z & 1;
                                        X /= 2;
                                }
                        }
                }
        }
        for (int i = 0; i < N; i++) Set(i, a[i]);
}

Bruno

#include <bits/stdc++.h>

#include "Brunolib.h"
using namespace std;

long long Bruno(int N, int A[]) {
        int64_t X = 0;
        for (int i = N - 3; i >= 0; i -= 3) {
                if (A[i] + A[i + 1] + A[i + 2] == 0) continue;
                if (A[i] == 1) {
                        if (A[i + 1] == 1 && A[i + 2] == 0) {
                                X = X * 2 + 1;
                        } else {
                                X = (X * 2 + A[i + 2]) * 2 + A[i + 1];
                        }
                } else {
                        if (A[i + 1] + A[i + 2] == 1) {
                                X = X * 2 + A[i + 2];
                        } else {
                                X = X * 4 + 1;
                        }
                }
        }
        return X;
}

• Subtask 1: 100 / 100