1456은 굉장히 어렵습니다. 어떻게 저걸 Python으로 해먹죠?

This commit is contained in:
2020-08-07 23:04:40 +09:00
parent 9e0f761ea7
commit 38e8440284
3 changed files with 59 additions and 0 deletions

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@@ -0,0 +1,28 @@
A, B = map(int, input().split())
P = [2]
cnt = 0
t = 4
while B >= t:
if A <= t <= B:
cnt += 1
t *= 2
for i in range(3, int(B ** (1 / 2)) + 1, 2):
for p in P:
if i % p == 0:
break
elif i < p ** 2:
P.append(i)
t = i * i
while B >= t:
if A <= t <= B:
cnt += 1
t *= i
break
else:
P.append(i)
t = i * i
while B >= t:
if A <= t <= B:
cnt += 1
t *= i
print(cnt) # 매우 빨라지고 싶은 에라토스테네스 내장형++