Submission #334904

#	Time	Username	Problem	Language	Result	Execution time	Memory
334904		dolphingarlic	Broken Device (JOI17_broken_device)	C++14	100 / 100	48 ms	2752 KiB

Anna

#include "Annalib.h"

void set(int p, int x) { for (int i = 0; i < 3; i++) Set(p + i, (x >> i) & 1); }

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

	for (int i = 0, j = 0; i < N; i += 3) {
		if (j > 62 || B[i] + B[i + 1] + B[i + 2] > 1) set(i, 0);
		else if ((!B[i] && !B[i + 1] && !B[i + 2]) || (B[i + 1] && !(X & (1ll << j)))) {
			if (X & (1ll << j)) {
				if (X & (1ll << j + 1)) set(i, 7);
				else set(i, 3);
			} else {
				if (X & (1ll << j + 1)) set(i, 5);
				else set(i, 4);
			}
			j += 2;
		} else {
			if (!(X & (1ll << j))) set(i, 2);
			else if (B[i]) set(i, 6);
			else set(i, 1);
			j++;
		}
	}
}

Bruno

#include "Brunolib.h"

long long Bruno(int N, int A[]) {
	long long ans = 0;
	for (int i = 0, j = 0; i < N; i += 3) {
		int hsh = A[i] + 2 * A[i + 1] + 4 * A[i + 2];
		switch (hsh) {
			case 1: case 6: ans += 1ll << j;
			case 2: j++; break;
			case 7: ans += 1ll << j;
			case 5: ans += 1ll << j + 1; j += 2; break;
			case 3: ans += 1ll << j;
			case 4: j += 2; break;
		}
	}
	return ans;
}

Compilation message (stderr)

Anna.cpp: In function 'void Anna(int, long long int, int, int*)':
Anna.cpp:14:23: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   14 |     if (X & (1ll << j + 1)) set(i, 7);
      |                     ~~^~~
Anna.cpp:17:23: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   17 |     if (X & (1ll << j + 1)) set(i, 5);
      |                     ~~^~~

Bruno.cpp: In function 'long long int Bruno(int, int*)':
Bruno.cpp:11:28: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   11 |    case 5: ans += 1ll << j + 1; j += 2; break;
      |                          ~~^~~

• Subtask 1: 100 / 100