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  1. Prepare
  2. Mathematics
  3. Fundamentals
  4. Handshake
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Handshake

  • SVVBathini_w
     + 0 comments

    For Python3 Platform

    Mathematics Logic - Using combinations. Here it is nc2 = n*(n-1)/2

    I wrote the code from scratch just to get more practice 
    def handshakes(n):
    return (n*(n-1))//2

t = int(input())
for i in range(t):
    n = int(input())
    
    result = handshakes(n)
    
    print(result)