题解 | #牛牛的素数和#
牛牛的素数和
http://www.nowcoder.com/practice/d748d79f68ab443482c5547d93824f50
l,r=list(map(int,input().split()))
def judge_num(n):
if n==2:
return True
else:
for i in range(2,n):
if n%i==0:
return False
break
else:
continue
return True
cnt=0
for i in range(l,r+1):
if judge_num(i):
cnt+=i
else:
continue
print(cnt)
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