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P4326 [COCI2006-2007#1] Herman

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Baoshuo Ren 2020-10-15 18:12:56 +08:00 committed by Baoshuo Ren
parent 9d229621dc
commit 15308f9454
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 12 additions and 0 deletions
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problem/P4326/P4326.cpp Normal file
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#include <bits/stdc++.h>
using namespace std;
const double pi = 3.14159265358979323;
int main() {
int r;
scanf("%d", &r);
printf("%.6lf\n%.6lf\n", r * r * pi, r * r * 2.0);
return 0;
}