UVA 424

//模板大水题
#include <stdio.h>
#include <string.h>
#define MAX 500
int sum[MAX];				
char num[MAX];				
int main()
{
	freopen( "in.txt", "r", stdin );
	int i, j;
	memset( sum, 0, sizeof(sum) );	
	while( scanf("%s", num) == 1 )
	{
		if( num[0] == '0' )			
			break;
		for( i = strlen(num)-1, j = 0; i >= 0; i--, j++ )   
		{
			sum[j] += num[i] - '0';			
			if( sum[j] >= 10 )                     
			{                                      
				sum[j] -= 10;		
				sum[j+1]++;
			}
		}
	}
	for( i = MAX; (i >= 0) && (sum[i] == 0); i-- );	
			if( i >= 0 )
				for(; i >= 0; i-- )
					printf( "%d", sum[i] );	
			else
				printf( "0" );	
	printf( "\n" );
	return 0;
}