和你的方法一样，搞不清楚为什么WA

> 请问这样做对吗？我就是统计出占用次数最多的一段，可就是WA啊，查不出哪错了
> #include <stdio.h>
> 
> int main()
> {
> 	int cas,n,i,up,down,temp;
> 	int a[200];
> 	scanf("%d",&cas);
> 	while (cas--)
> 	{
> 		scanf("%d",&n);
> 		for (i=0; i<200; i++)  a[i] = 0;
> 		while (n--)
> 		{
> 			scanf("%d %d",&down,&up);
> 			if (down > up)  
> 			{
> 				temp = down;
> 				down = up;
> 				up = down;
> 			}
> 			down = (down - 1) / 2;
> 			up = (up - 1) / 2;
> 			
> 			for (i=down; i<=up; i++)
> 				a[i]++;
> 		}
> 		int max = 0;
> 		for (i=0; i<200; i++)
> 			if (a[i] > max)  max = a[i];
> 		printf("%d\n",max * 10);
> 	}
> 	return 0;
> }