hdoj 1049 Climbing Worm

hdoj 1049  Climbing Worm

 #include<iostream> using namespace std; int n,u,d; int main(){ int n; while(cin>>n&&n!=0){ cin>>u>>d; int ti=0; int len=0; while(len<n){ ti++; len+=u; if(len>=n)break; else {len-=d;ti++;} } cout<<ti<<endl; } return 0; }