#include<iostream> using namespace std; int main() { const float pi=3.14159; double
r,l,s; cin>>r; l=2*pi*r; s=pi*r*r; cout<<l<<' '<<s<<endl; return 0; }#include<iostream>
using namespace std; int main() { int a,b,c; cin>>a>>b; c=3*a-2*b+1; cout<<c<<endl;
return 0; }#include<iostream> using namespace std; int main() { int a,b,c,d,ans;
cin>>a>>b>>c; d=a-b; a=d+c; ans=a*b; cout<<"Ans="<<ans<<endl; return 0; }
#include<iostream> using namespace std; int main() { int a,b,c; cin>>a>>b; c=3*a-2*b+1;
cout<<c<<endl; return 0; }#include<iostream> using namespace std; int main() { int
a,b,c,d,ans; cin>>a>>b>>c; d=a-b; a=d+c; ans=a*b; cout<<"Ans="<<ans<<endl; return 0; }
#include<iostream> using namespace std; int main() { cout<<2+4<<endl;
cout<<"ABCD"<<endl; int a=10,b=5; cout<<a+b<<endl; return 0; } #include<iostream> using
namespace std; int main() { cout<<" *\n"; cout<<" ***\n"; cout<<" *****\n";
cout<<"*******\n"; cout<<" ***\n"; cout<<" ***\n"; cout<<" ***\n"; cout<<" ***\n";
cout<<" ***\n"; return 0; } #include<iostream> using namespace std; int main() { int
a,b,h,s; a=15; b=20; h=12; s=(a+b)*h/2; cout<<s<<endl; return 0; }