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413. Clock

Time Limit:	1 seconds
Memory Limit:	64000KB
Points:	10

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Clock's hands move with constant angular speeds and show h hours and m minutes.
Write the program to find number of full minutes till the nearest moment in which hands will coincide.

Input

Two numbers h (0<=h<=11) and m (0<=m<=59), separeated by space.

Output

Number of full minutes.

Samples

Input	Output
0 0	0
1 1	4

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Problems from Contests /

VoSTU Selection Rounds /

Selection Round on ACM ICPC 2007 /

413.

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414. Shortest Expression

412. Texture

We can all benefit by doing occasional "toy" programs, when artificial restrictions are set up, so that we are forced to push our abilities to the limit. The art of tackling miniproblems with all our energy will sharpen our talents for the real problems. Donald E. Knuth.

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