# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
580117 | jasmin | Boarding Passes (BOI22_passes) | Cpython 3 | 19 ms | 2772 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
s=input()
n=len(s)
ans=0
for i in range(n//2):
ans+=i
if(n%2==1):
ans+=(n//2)*(0.5)
print(ans)
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