hdu 1.2.8

 #include<cstdio>
 #include<iostream>
 using namespace std;

 int pow(int a,int b)
 {
     int ans = ;
     while(b--)
     {
         ans *= a;
     }
     return ans;

 }
 int main()
 {
     //freopen("input.txt","r",stdin);
     int T;
     int a,b,num,k;
     char opl,opr;
     while(cin>>T)
     {
         num = ;

         while(T--)
         {
             cin>>a>>opl>>b>>opr;
             k = ;
             while(a)
             {
                 num += a%*pow(b,k++);
                 a /= ;
             }

         }
         cout<<num<<endl;
     }
     return ;
 }