# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1163585 | jmuzhen | Ekoeko (COCI21_ekoeko) | Pypy 3 | 134 ms | 48796 KiB |
n = int(input())
print(n*(n-1)/2)
Compilation message (stdout)
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