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p53ud0k0d3/Hackerrank-Handshake.py

Created March 18, 2015 18:12
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HackerRank Handshake
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Hackerrank-Handshake.py
people = []
for _ in range(int(raw_input())):
people.append(int(raw_input()))
for n in people:
print ((n*(n-1))/2)
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