icpc_preli_2017_i_repeated_digit_sum.cpp

#include<bits/stdc++.h>
#define read() freopen("C:\\Users\\HP NPC\\Documents\\cf\\code\\input.txt","r",stdin)
#define write() freopen("C:\\Users\\HP NPC\\Documents\\cf\\code\\output.txt","w",stdout)
using namespace std;
int main()
{
    read();
    write();
    int tc;
    cin>>tc;
    for(int t=1;t<=tc;t++)
    {
        printf("Case %d: ",t);
        string a, b;
        cin>>a>>b;
        int len_a = a.size();
        int len_b=b.size();
        long long sum_a=0;
        for(int i =0;i<len_a;i++)
        {
            sum_a=1+ ((sum_a*10)%9+ (a[i]-'1')%9)%9;
        }
        //cout<<sum_a<<endl;
        long long sum_b=0;
        for(int i =0;i<len_b;i++)
        {
            sum_b = 1+((((sum_b*10)%6)+(b[i]-'1')%6)%6);
        }
        //cout<<sum_b<<endl;
        long long res = 1+(((int)pow(sum_a,sum_b)-1)%9);
        cout<<res<<endl;
    }
}