题解 | 牛牛的素数和
牛牛的素数和
https://www.nowcoder.com/practice/d748d79f68ab443482c5547d93824f50
l, r = map(int, input().split())
s = 0
for i in range(l, r + 1):
f = 0
for j in range(2,i):
if i % j == 0:
f = f + 1
if f == 0:
s = s + i
print(s)
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