#include<stdio.h>
#define N 4
int fun(int a[][N])
{
	int i,j,max=a[0][0];
	for(i=0;i<2;i++)
		for(j=0;j<N;j++)
			if(max<a[i][j])
				max=a[i][j];
			return max;
}
main()
{
	int aa[2][N]={1,2,3,4,8,43,56,12};
	printf("max=%d\n",fun(aa));
}