42212

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
42212	Songgr	求阴影面积	C++	Accepted	0 MS	252 KB	154	2024-02-24 13:50:05

#include<bits/stdc++.h> using namespace std; int main() { float a; cin>>a; float s=(a*a)/4.0; cout<<fixed<<setprecision(2)<<s; return 0; }