Submission #8004606

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
int main(){
    double R,N,M;cin>>R>>N>>M;
    double p,q,ans=0;
    double a,b;
    for(int i=1;i<=N+M-1;i++){
        p=abs(2*R*i/N-R);
        q=abs(2*R*(i-M)/N-R);
        a=0;b=0;
 
        if(i<=N)a=sqrt(R*R-p*p);
        if(i-M>=0)b=sqrt(R*R-q*q);
        ans+=max(a,b)*2;
    }
    cout<<fixed<<setprecision(10)<<ans<<endl;
}

Submission Info

Judge Result