| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 882214 | Mr_Husanboy | Odd-even (IZhO11_oddeven) | C++17 | 0 ms | 0 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.
n = int(input())
l = 1
r = 10**51
while l <= r:
m = (l + r) // 2
if((m + 1) * m / 2 >= n):
r = m - 1
else:
l = m + 1
l -= 1
k = (l + 1) * l // 2
if l % 2 == 1:
if n == k:
print((n - (l - 1) // 2) * 2 - 1)
else:
print((n - (l + 1) // 2) * 2)
else:
if n == k:
print((n - l // 2) * 2)
else:
print((n - l // 2) * 2 - 1)