You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
20 lines
400 B
C++
20 lines
400 B
C++
#define _CRT_SECURE_NO_WARNINGS
|
|
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
|
|
#include <bits/stdc++.h>
|
|
using namespace std;
|
|
int main()
|
|
{
|
|
int T;
|
|
double a, b;
|
|
cin >> T;
|
|
while (T--)
|
|
{
|
|
cin >> a >> b;
|
|
char str[200];
|
|
sprintf(str, "%.8lf", 2 * b + a * acos(-1));
|
|
str[strlen(str) - 2] = 0;
|
|
puts(str);
|
|
}
|
|
return 0;
|
|
}
|