Clocks#111
A striking clock chimes a number of times equal to the hour shown on the dial (from to ) at each full hour. Additionally, it chimes once each time the minute hand points to .
The input contains the start and end times within a single calendar day. Each time is given as hours () and minutes (), separated by a space (0 \leq H \leq 23, 0 \leq M \leq 59).
Output the total number of chimes in the specified interval.
Example 1