Submission #882212

#	Time	Username	Problem	Language	Result	Execution time	Memory
882212		Mr_Husanboy	Odd-even (IZhO11_oddeven)	Pypy 3	0 / 100	29 ms	18488 KiB

oddeven

n = int(input())
l = 1
r = 10**50
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)

• Subtask 1: 0 / 100