IRCTC Waitlist Cancellation Counter
IRCTC Waitlist Cancellation Counter
MediumStrings0% accepted
Priya is tracking her train ticket on IRCTC app. The waitlist shows a string of 'W' (waitlisted) and 'C' (confirmed after cancellation). Each 'C' cancels one preceding 'W'. Count remaining waitlisted passengers after all cancellations.
Approach
Given a waitlist string with W (waitlisted) and C (cancellations), count remaining Ws after each C cancels one W.
Input
WWWCWC
Output
2
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