Submission #334257

#	Time	Username	Problem	Language	Result	Execution time	Memory
334257		dolphingarlic	Broken Device (JOI17_broken_device)	C++14	51 / 100	54 ms	3144 KiB

Anna

#include "Annalib.h"

void Anna(int N, long long X, int K, int P[]) {
    bool broken[150];
    for (int i = 0; i < N; i++) broken[i] = false;
    for (int i = 0; i < K; i++) broken[P[i]] = true;

    for (int i = 0, j = 0; i < N; i += 3) {
        if (j > 60) Set(i, 0), Set(i + 1, 0), Set(i + 2, 0);
        else if (!broken[i] && !broken[i + 1] && !broken[i + 2]) {
            Set(i, 1);
            Set(i + 1, (X & (1ll << j)) >> j);
            Set(i + 2, (X & (1ll << j + 1)) >> j + 1);
            j += 2;
        } else if ((X & (1ll << j)) && !broken[i + 1] && !broken[i + 2]) {
            Set(i, 0), Set(i + 1, 1), Set(i + 2, 1);
            j++;
        } else if (!(X & (1ll << j)) && (!broken[i + 1] || !broken[i + 2])) {
            Set(i, 0);
            if (!broken[i + 1]) Set(i + 1, 1), Set(i + 2, 0);
            else Set(i + 1, 0), Set(i + 2, 1);
            j++;
        } else Set(i, 0), Set(i + 1, 0), Set(i + 2, 0);
    }
}

Bruno

#include "Brunolib.h"

long long Bruno(int N, int A[]) {
    long long ans = 0;
    for (int i = 0, j = 0; i < N && j <= 60; i += 3) {
        if (A[i]) {
            ans += A[i + 1] * (1ll << j) + A[i + 2] * (1ll << j + 1);
            j += 2;
        } else if (A[i + 1] || A[i + 2]) {
            ans += (A[i + 1] + A[i + 2] - 1) * (1ll << j);
            j++;
        }
    }
    return ans;
}

Compilation message (stderr)

Anna.cpp: In function 'void Anna(int, long long int, int, int*)':
Anna.cpp:13:39: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   13 |             Set(i + 2, (X & (1ll << j + 1)) >> j + 1);
      |                                     ~~^~~
Anna.cpp:13:50: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   13 |             Set(i + 2, (X & (1ll << j + 1)) >> j + 1);
      |                                                ~~^~~

Bruno.cpp: In function 'long long int Bruno(int, int*)':
Bruno.cpp:7:65: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
    7 |             ans += A[i + 1] * (1ll << j) + A[i + 2] * (1ll << j + 1);
      |                                                               ~~^~~

• Subtask 1: 51 / 100