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답안 #338452

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
338452 2020-12-23T07:18:25 Z amunduzbaev 홀-짝 수열 (IZhO11_oddeven) Python 3
0 / 100
 16 ms 2796 KB 
import math

x = int(input())
l = 1
r = int(math.sqrt(x))+1
while (l < r):
    m = (l + r)//2
    if((m*(m+1)//2) > x):
        r = m-1
    elif(((m+1)*(m+2)//2) < x):
        l = m+1
    else:
        break
 
ans = (l + r)//2
need = x - ans*(ans+1)//2
if(need == 0):
    aa = ans * ans
else :
    aa = ans * ans+1 +((need-1)*2)
print(aa)

Subtask #1
0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 2796 KB Output is correct
2 Correct 16 ms 2796 KB Output is correct
3 Incorrect 16 ms 2796 KB Output isn't correct
4 Halted 0 ms 0 KB -