import sys

# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
inf = 10**20
# md = 998244353
md = 10**9+7

n = II()
ans = n
if n == 1:
    print(1)
else:
    for j in range(1, n+1):
        i = round(n**(1/j))+3
        while i**j>n:i-=1
        if i==1:break
        k = n-i**j
        # print(i,j,k,i+j+k)
        ans = min(ans, i+j+k)
        if i==1:break
    print(ans)