Crypto Gift Professor invites his n friends on his birthday. He wants to reward all of them and make them happy.... |
Efficient Tour Gopher is embarking on yet another adventurous tour, this time across N cities, each uniquely define...
Moderate
15/18/66 |
Permutation Query An array of integers p1,p2,....,pn is called a permutation if it contains each number from 1 to n...
Moderate
22/34/149 |