hdu 2211

题意: 中文题目,自己看..............

递归调用....

没什么难度,注意下long long就行........

AC代码:

#include <iostream>
#define LL long long
using namespace std;
LL L(LL n,int k)
{
    if(n==k)  return k;
    int a=L(n-n/k,k);
    return (a-1)/(k-1)+a;
}
int main()
{
    LL n;
    int k,t;
    cin>>t;
    while(t--)
    {
        cin>>n>>k;
        cout<<L(n,k)<<endl;
    }
    return 0;
}