Primes on Interval

237C1600· expert1s256 MB⌨ stdin/stdout

#binary search #number theory #two pointers

Examples

Sample 1of 3

Input

2 4 2

Output

Sample 2of 3

Input

6 13 1

Output

Sample 3of 3

Input

1 4 3

Output

-1

237C.cpp

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Ln 11·137 BGNU C++20 (64)