Runtime error (SIGSEGV)

[bruceleefinal]

My 1st Problem : spoj.com/problems/MONKK/
Error: runtime error (SIGSEGV)

#include <stdio.h>
int main(void) {
	// your code here
	int temp=0;
	int t, a[213][100][100], r[213], c[213], i, j,x1,y1,x2,y2,ans[213]={0},k;
	char b[213][100][100];
	scanf("%d",&t);
for(k=0 ; k<t ; k++)
{
	scanf("%d%d",&r[k], &c[k]);
	for(i=0 ; i<r[k] ; i++)
		for(j=0 ; j<c[k] ; j++)
		{
			scanf("%c",&b[k][i][j]);
		}
}
for(k=0 ; k<t ; k++, ans[k]=0)
{
	for(i=0 ; i<r[k] ; i++)
		for(j=0 ; j<c[k] ; j++)
		{
			if(b[k][i][j]=='B')
			{
				a[k][i][j]=1;
			}
			else if(b[k][i][j]=='.')
			{
				a[k][i][j]=0;
			}
			else
			{
				a[k][i][j]=-1;
			}
		}
//*
	for(x1=0 ; x1<r[k]-1 ; x1++)
	{
		for(y1=0 ; y1<c[k]-1 ; y1++)
		{
			for(x2=x1, y2=y1, temp=0 ; x2<r[k] && y2<c[k] ; x2++, y2++)
			{
				for(i=x1 ; i<=x2 ; i++)
					for(j=y1 ; j<=y2 ; j++)
					{
						if(a[k][i][j]==1)
						{
							temp++;
						}
						if(a[k][i][j]==-1)
							temp--;
					}
				if(temp>ans[k])
					ans[k]=temp;
			}
		}
	}
	//*/
}
for(k=0 ; k<t ; k++)
	printf("Case %d: %d\n",k+1,ans[k]);
	return 0;
}

[leppyr64]

You're using a lot of memory storing all of the test cases. You don't need to read all of the input and then do all of the output. You can read and write one case at a time.