This is a kind of "two snakes" game
1234
snake1 snake2
1 push
2 push
1
3 push
2
1
3 push
2 push
3
1 push -> ready to pop
2
3
so push in 2nd stack if empty.
Posts
10 minutes ago
Have 2 stacks(say stack1 and stack2). Push into one stack (say stack1)
ReplyDeleteTo perform pop operation, check if stack2 contains any element,if yes then pop stack2. else transfer n-1 elements from stack1 to stack2 and return nth element.