2016暑假集训训练2 I题 Doing Homework again

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

int h[1005][2], n, visit[1005];

int comp(const void * a, const void * b)
{
	return *(((int*)b)+1) - *(((int *)a)+1);
}

int main (void)
{
	int t, i, j, day, sum, min, v;
	scanf("%d",&t);
	while (t--) {
		scanf("%d",&n);
		for (i=0; i<n; i++) 
			scanf("%d",&h[i][0]);
		for (i=0; i<n; i++)
			scanf("%d",&h[i][1]);
		qsort(h,n,sizeof(h[0]),comp);
		memset(visit,0,sizeof(visit));
		for (i=0, sum=0; i<n; i++) {
			for (j=h[i][0]; j>0; j--) {
				if (visit[j] == 0) {
					visit[j] = 1;
					break;
				}
			}
			if (j == 0) sum += h[i][1];
		}
		printf("%d\n",sum);
	}
	return 0;
}