1015. or the A+b

Title Description:

read in two positive integers a and B less than 10000, calculate a+b. It is important to note that if the end of A and B (not more than 8) digits are the same, please output-1 directly.

Input:

The test input contains several test cases, one row for each test case, the format "A B K", and two adjacent numbers with a space interval. When A and B are at the end of the 0 o'clock input, the corresponding result is not output.

Output:

Output 1 rows For each test case, that is, the value of a+b or 1.

Sample input:

1 2 111 21 1108 8 236 64 30 0 1

Sample output:

3-1-1100

#include <iostream>using namespacestd;intMain () {intA,b,k,i;  while(cin>>a>>b>>k) {        if(a==0&& b==0)return 0; Else{        intc=a+b; BOOLflag=false;  for(i=0; i<k;i++){            if(a%Ten!=b%Ten) {flag=true;  Break; } A=a/Ten; b=b/Ten; }        if(flag) cout<<c<<Endl; Elsecout<<"-1"<<Endl; }}    return 0;}

1015. or the A+b