#include <iostream> 
using namespace std; 
int main() 
{ 	
int k,n; 	
while(cin>>n>>k){ 	
int x=(n-k)/(k-1); 		
cout<<n+x+1<<endl; 	
}
}

• Re:水题，不用__int64 (68) bergkamp 2009-05-02 19:41:58