Submission #491098

#	Time	Username	Problem	Language	Result	Execution time	Memory
491098		rainboy	Segway (COI19_segway)	C11	100 / 100	193 ms	32852 KiB

segway

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

#define N	20000
#define X	300
#define T	15000
#define INF	0x3f3f3f3f

int min(int a, int b) { return a < b ? a : b; }

int *ei[T + 1], eo[T + 1];

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

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

int main() {
	static int ss[N][3], xx[N], yy[N], tt[N], kk[X + 1];
	static char accel[X + 1];
	int n, m, h, i, x, t, o;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		for (h = 0; h < 3; h++)
			scanf("%d", &ss[i][h]);
	scanf("%d", &m);
	for (h = 0; h < m; h++) {
		scanf("%d", &x);
		accel[x] = 1;
	}
	for (t = 0; t <= T; t++)
		ei[t] = (int *) malloc(2 * sizeof *ei[t]);
	for (i = 0; i < n; i++)
		tt[i] = ss[i][0], append(tt[i], i);
	memset(kk, 0, (X + 1) * sizeof *kk);
	kk[0] += n;
	for (t = 0; t <= T; t++) {
		for (o = eo[t]; o--; ) {
			i = ei[t][o];
			if (xx[i] + 1 < X && accel[xx[i] + 1] && yy[i] <= xx[i] + 1)
				yy[i] = xx[i] + 1 + kk[xx[i] + 1] % 20;
		}
		for (o = eo[t]; o--; ) {
			i = ei[t][o];
			kk[++xx[i]]++;
			if (xx[i] < X)
				append(tt[i] = yy[i] <= xx[i] ? t + ss[i][xx[i] / (X / 3)] : t + 1, i);
		}
	}
	for (i = 0; i < n; i++)
		printf("%d\n", tt[i]);
	return 0;
}

Compilation message (stderr)

segway.c: In function 'append':
segway.c:17:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   17 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
segway.c: In function 'main':
segway.c:27:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
segway.c:30:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |    scanf("%d", &ss[i][h]);
      |    ^~~~~~~~~~~~~~~~~~~~~~
segway.c:31:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |  scanf("%d", &m);
      |  ^~~~~~~~~~~~~~~
segway.c:33:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   scanf("%d", &x);
      |   ^~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45