uva 424

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int i=0,j,l=0,k,n=0,z,b,c=0,sum=0,carry=0,ans[1100];
    char p[1100],a[1100][1100];
    while(1)
    {
        cin>>p;
        k=strlen(p);
        if(p[0]=='0'&&k==1)
            break;

        if(k>n)
            n=k;
        strrev(p);
        strcpy(a[c],p);
        c++;
    }
    for(i=0;i<n;i++)
    {
        for(j=0;j<c;j++)
            if(a[j][i]<='9'&&a[j][i]>='0')
        {
            sum=sum+a[j][i]-48;
        }
        sum+=carry;
        k=sum%10;
        ans[l]=k;
        carry=sum/10;
        sum=0;
        l++;
    }
    if(carry!=0)
    {
        ans[l]=carry;
        l++;
    }
    int x=0;
    for(i=l-1;i>=0;i--)
    {
        if(ans[i]==0&&x==0)
            continue;
        else
        {
             cout<<ans[i];
             x++;
        }
    }
    if(x==0)
        cout<<"0";
    cout<<endl;
    return 0;
}