#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; if(n>=30) printf("%.1f",n*1.0); else if(n>=20&&n<=29) printf("%.1f",n*1.2); else if(n>=10&&n<=19) printf("%.1f",n*1.5); else if(n<10) printf("%.1f",n*1.8); } /************************************************************** Problem: 1304 User: linzihang Language: C++ Result: Accepted Time:20 ms Memory:2072 kb ****************************************************************/