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dp = [False]*(10**5+1);c = 0;check = [False]*(10**5+1)
for i in range(1,10**5+1):
    if i == sosu[c]:dp[i] = True;c+=1
    else:dp[i] = False
for i in range(len(sosu)):
    n = sosu[i]
    if dp[(n+1)//2]:check[n] = True
dp_ios = [0]*(10**5+1)
for i in range(1,10**5+1):
    if check[i]:dp_ios[i] = dp_ios[i-1] + 1
    else:dp_ios[i] = dp_ios[i-1]
q = int(input())
for i in range(q):
    l,r = map(int,input().split())
    print(dp_ios[r]-dp_ios[l-1])

Measured memory_bytes: 10320