codeforce - Life Without Zeros

#include<bits/stdc++.h>
using namespace std;
#define fastread()(ios_base::sync_with_stdio(false),cin.tie(NULL));
int RemoveZero(int a)
{
    int sum=0,dig,pos=1;
    while(a)
    {
        dig=a%10;
        a/=10;
        while(dig)
        {
            sum+=(dig*pos);
            pos*=10;
            dig/=10;
        }
    }
    return sum;
}
int main()
{
    int a,b,c;
    fastread();
    cin>>a>>b;
    c=a+b;
    a= RemoveZero(a);
    b=RemoveZero(b);
    c=RemoveZero(c);
    if(a+b==c)
    {
        printf("YES\n");
    }
    else printf("NO\n");
    return 0;
}