#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,c,d,r;
cin >>a;
r = 3.14159;
c = a*2;
d = a*2*r;
b = a*a*r;
cout <<fixed<<setprecision(4) <<c <<" " ;
cout<<fixed<<setprecision(4) ...
| English Article | Word Count | Duration | Accuracy | Speed | Backspace | Error | Slogan |
|---|---|---|---|---|---|---|---|
| 《c++》 | 257字 | 3.9分钟 | 100% | 62 CPM | 6 次 | 0 | 不及格，加强练习！ |
| Inspirational quotes: 人们之所以寂寞，是因为他们不去修桥，反而筑墙将自己围堵起来。 ——爱默生 | |||||||
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