> #include <stdio.h>
> #include <string.h>
> #define max(a,b) a>b?a:b
> int main()
> {
> 	
> 
> 	int f,v,value[120][120],table[120][120];
> 	int i,j;
> 
> 	while (scanf("%d%d",&f,&v) != -1)
> 	{
> 		for (i = 1;i <= f;i ++)
> 		{
> 			for (j = 1; j <= v;j ++)
> 				scanf("%d",&table[i][j]);
> 		}
> 		for (i = 1;i <= f;i ++)
> 			value[0][i] = -0x7fffffff;
> 		value[0][0] = 0;
> 		for (i = 1; i <= v;i ++)
> 		{
> 			for (j = 1; j <= f;j ++)
> 			{
> 				if (j <= i)
> 					value[i][j] = max(value[i-1][j-1]+table[j][i],value[i-1][j]);
> 				else value[i][j] = -0x7fffffff;
> 			}
> 		}
> 		printf("%d\n",value[v][f]);
> 	}
> 	return 0;
> }