#include<bits/stdc++.h> using namespace std; double a,b,c; int main(){ cin>>a>>b>>c; cout<<a0.2+b0.3+c*0.5; return 0; }

#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; a=a/5; b=b*0.3; c=c/2; cout<<a+b+c; return 0; }

#include <iostream> using namespace std; int main() { int a,b,c,d=0; cin >> a>>b>>c; a*=0.2; b*=0.3; c*=0.5; d=a+b+c; cout << d; }

#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; int g; g=a0.2+b0.3+c*0.5; cout<<g; return 0; }

#include <iostream> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; cout<<(a0.2)+(b0.3)+(c*0.5); return 0; }

#include <iostream> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; cout <<a0.2+b0.3+c*0.5; return 0; }