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답안 #337868

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
337868 2020-12-22T04:05:00 Z talant117408 홀-짝 수열 (IZhO11_oddeven) Python 3
100 / 100
 18 ms 3052 KB 
import math
n = input()
n = int(n)

def calc(x):
    return x*(x+1)//2

l = 1
r = 1e51

while l < r:
    mid = int((l+r+1)//2)
    if calc(mid) <= int(n):
        l = mid
    else:
        r = mid-1
        
l = int(l)

if calc(l) == n:
    print(int(int(n*2)-int(l)))
else:
    print(int(int(n*2)-int(l)-1))

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 2796 KB Output is correct
2 Correct 18 ms 3052 KB Output is correct
3 Correct 16 ms 2796 KB Output is correct
4 Correct 18 ms 2796 KB Output is correct
5 Correct 16 ms 2796 KB Output is correct
6 Correct 16 ms 2816 KB Output is correct
7 Correct 16 ms 2796 KB Output is correct
8 Correct 16 ms 2924 KB Output is correct
9 Correct 16 ms 2796 KB Output is correct
10 Correct 16 ms 2816 KB Output is correct
11 Correct 16 ms 2796 KB Output is correct
12 Correct 16 ms 2796 KB Output is correct
13 Correct 18 ms 2924 KB Output is correct
14 Correct 16 ms 2796 KB Output is correct
15 Correct 16 ms 2796 KB Output is correct
16 Correct 16 ms 2796 KB Output is correct
17 Correct 16 ms 2796 KB Output is correct
18 Correct 16 ms 2796 KB Output is correct
19 Correct 18 ms 2796 KB Output is correct
20 Correct 17 ms 2796 KB Output is correct
21 Correct 18 ms 2796 KB Output is correct
22 Correct 17 ms 2796 KB Output is correct