Submission #643619

#	Time	Username	Problem	Language	Result	Execution time	Memory
643619		rainboy	Sprinkler (JOI22_sprinkler)	C11	100 / 100	709 ms	59760 KiB

sprinkler

#include <stdio.h>
#include <stdlib.h>

#define N	200000
#define D	40
#define N_	(N + D)

int *ej[N_], eo[N_];

void append(int i, int j) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
	ej[i][o] = j;
}

int pp[N_];

void dfs(int p, int i) {
	int o;

	pp[i] = p;
	for (o = eo[i]; o--; ) {
		int j = ej[i][o];

		if (j != p)
			dfs(i, j);
	}
}

int main() {
	static int aa[N_][D + 1];
	int n, q, md, h, i, j, d;

	scanf("%d%d", &n, &md);
	for (i = 0; i < n + D; i++)
		ej[i] = (int *) malloc(2 * sizeof *ej[i]);
	for (h = 0; h < n - 1; h++) {
		scanf("%d%d", &i, &j), i--, j--;
		append(i, j), append(j, i);
	}
	for (h = 0; h + 1 < D; h++)
		append(n + h, n + h + 1), append(n + h + 1, n + h);
	append(n + D - 1, 0), append(0, n + D - 1);
	dfs(-1, n);
	for (i = 0; i < n + D; i++)
		for (d = 0; d <= D; d++)
			aa[i][d] = 1;
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i][0]);
	scanf("%d", &q);
	while (q--) {
		int t, ans;

		scanf("%d%d", &t, &i), i--;
		if (t == 1) {
			int x;

			scanf("%d%d", &d, &x);
			while (d >= 0) {
				aa[i][d] = (long long) aa[i][d] * x % md;
				if (d > 0)
					aa[i][d - 1] = (long long) aa[i][d - 1] * x % md;
				i = pp[i], d--;
			}
		} else {
			ans = 1;
			for (d = 0; d <= D; d++, i = pp[i])
				ans = (long long) ans * aa[i][d] % md;
			printf("%d\n", ans);
		}
	}
	return 0;
}

Compilation message (stderr)

sprinkler.c: In function 'append':
sprinkler.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
sprinkler.c: In function 'main':
sprinkler.c:36:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |  scanf("%d%d", &n, &md);
      |  ^~~~~~~~~~~~~~~~~~~~~~
sprinkler.c:40:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   scanf("%d%d", &i, &j), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~
sprinkler.c:51:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |   scanf("%d", &aa[i][0]);
      |   ^~~~~~~~~~~~~~~~~~~~~~
sprinkler.c:52:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |  scanf("%d", &q);
      |  ^~~~~~~~~~~~~~~
sprinkler.c:56:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |   scanf("%d%d", &t, &i), i--;
      |   ^~~~~~~~~~~~~~~~~~~~~
sprinkler.c:60:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |    scanf("%d%d", &d, &x);
      |    ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 9 / 9
• Subtask 3: 29 / 29
• Subtask 4: 12 / 12
• Subtask 5: 30 / 30
• Subtask 6: 17 / 17