Editorial for New Year's '18 P1 - Happy New Year! - Olympiads Online Judge

Editorial for New Year's '18 P1 - Happy New Year!

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Author: Kirito

We can convert $h$ $h$ and $m$ $m$ into seconds and add them to $s$ $s$ . The number of seconds the task takes is $s \bmod 60$ $s mod 60$ and the number of minutes $\left\lfloor \dfrac s {60} \right\rfloor \bmod 60$ $⌊ \frac{s}{60} ⌋ mod 60$ , and the number of hours is $\left\lfloor \dfrac s {3600} \right\rfloor \bmod 12$ $⌊ \frac{s}{3600} ⌋ mod 12$ . Then, subtract that from 12:00:00 to get the answer. Note that the hours output should be between $0$ $0$ and $11$ $11$ .

Time Complexity: $\mathcal O(1)$ $O (1)$

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