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HO1036 - Тойрог

Тойргийн радиус өгсөн бол түүний уртыг таслалаас хойш хоёр орны нарийвчлалтай ол.

Input

Радиус болох r бодит тоо өгөгдөнө. Утга нь 10^7-с хэтрэхгүй.

Output

Тойргийн периметрийг таслалаас хойш хоёр орны нарийвчлалтай олно.

Example

Input:
3.5
Output:
21.98

Нэмсэн:munkhbat
Огноо:2013-01-13
Хугацааны хязгаарлалт:1s
Эх кодын хэмжээний хязгаарлалт:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Програмчлалын хэлүүд:Бүгд дараах хэлүүдээс бусад: ASM64 NCSHARP JULIA PYPY3

hide comments
2024-01-20 06:08:16
hairtai shvv batsannar
mine
2023-10-23 07:54:37
amjilt cyber surgulin 7-1 angin gomo tengis saraanad sn
2022-11-03 06:40:41
#include<bits/stdc++.h> //6.5
using namespace std;
int main (){
double a,b,d,e;
cin>>a;
d=a*2*3.14;
printf("%.2lf",d);
}

Last edit: 2022-11-03 06:41:45
2022-03-21 06:10:29
#include<cstdio>
double a,s,d;
int main ()
{
scanf("%lf",&a);
s=2*a*3.14;
printf("%.2lf",s);
}
2022-02-14 03:17:10
hairtai shu
2022-01-29 03:03:27
#include<iostream>
#include<iomanip>
using namespace std;
int main(){
double r;
cin >> r;
cout.setf(ios::fixed);
cout.precision(2);
cout << 2*r*3.14;

}
2022-01-29 03:03:10
tavi
2022-01-29 02:50:39
:(
2022-01-28 06:48:41
cout << fixed << setprecision(2); gej bichij baigaa
2022-01-27 11:31:20
cout << fixed;
cout << setprecision(2);
gedgee bicij bgamu
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