#include <iostream>#include <string>using namespace std;const int M = 100 + 10;char input[M];int A[M], sum[M];void Reverse( int A[], const char str[] ){    int len = strlen( str );    int index = 0;    for ( int i = len - 1; i >= 0; --i )        A[index++] = str[i] - ‘0‘;}int main(){    int sumLen = 0;    memset( sum, 0, sizeof(sum) );    while ( scanf( "%s", input ) != EOF )    {        int digitSum;        if ( strcmp( input, "0") == 0 )            break;        memset( A, 0, sizeof(A) );        Reverse( A, input );        for ( int i = 0 ; i < M; ++i )        {            digitSum = sum[i] + A[i];            sum[i] = digitSum % 10;            sum[i+1] += digitSum/10;        }    }    for ( int i = M-1; sum[i] == 0; --i )        sumLen = i;
    for( int i = sumLen-1; i >= 0; --i )        printf( "%d", sum[i] );    printf( "\n" );    return 0;}