Editorial for Waiting

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Split each time into seconds minutes and hours, and then get the total number of seconds using the formula

\displaystyle \text{total} = \text{seconds} + \text{minutes} \times 60 + \text{hours} \times 3600

The difference between the two totals is the answer.

Skills needed: String manipulation, simple math

Time complexity: \mathcal O(1)


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