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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main()
  5. {
  6.     int t, n;
  7.     double d;
  8.     scanf("%d",&t);
  9.     while(t--)
  10.     {
  11.         scanf( "%lf %d",&d,&n);
  12.         if(n%2==0)
  13.             printf("%.3f %d\n",(acos(-1.0)*d)/n,n/2);
  14.         else
  15.             printf("%.3f %d\n",(acos(-1.0)*d)/n,n);
  16.         }
  17.     return 0;
  18. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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4
3.183192742 2
3.183192742 3
3.183192742 4
3.183192742 5
stdout
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5.000 1
3.333 3
2.500 2
2.000 5
https://ideone.com/HOfnyk
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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