BAEKJOON PYTHON 2292 벌집

Prob

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Approach

계차가 등차인 수열

3x^2 - 3x + 1 > n 를 만족하는 최댓값 x

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Code

n = int(input())
x = 1
while(3 * x * x - 3 * x + 1 < n):
    x += 1
print(x)

 

출처

https://www.acmicpc.net/problem/2292