C++
XOR

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Array A length n code
Python
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MAX = 10000

# prefix[i] is going to
# store count of primes
# till i (including i).

pt =[0]*(MAX + 1)


def abc():

prime = [1]*(MAX + 1)


p = 2

while(p * p <= MAX):


if (prime[p] == 1):
i = p * 2

while(i <= MAX):

prime[i] = 0

i += p

p+=1

for p in range(2,MAX+1):

pt[p] = pt[p - 1]

if (prime[p]==1):

pt[p]+=1
//@allcoding1
def query(a,b):
return pt[b]-pt[a-1]
n=int(input())
c=0
for i in range(n):
a,b=map(int,input().split())
abc()
c+=query(a,b)
mod=10**9+7
print(c%mod)



prime numbers in range[L,R]

All test cases passed

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Alex code
Python 3
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Java
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