Submission #1308492

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308492		reginox	홀-짝 수열 (IZhO11_oddeven)	Pypy 3	100 / 100	170 ms	48800 KiB

oddeven

n = int(input())
l = 0
r = n
while(l <= r):
  mid = (l+r)//2
  if(mid*(mid+1) <= n*2):
    l = mid+1
  else:
    r = mid-1
v = l-1
add = 0
if(n-v*(v+1)//2 > 0):
  add = (n-v*(v+1)//2)*2-1
print(int(v**2+add))

Compilation message (stdout)

Compiling 'oddeven.py'...

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  adding: __main__.pyc (deflated 30%)

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• Subtask 1: 100 / 100