Description: clock to solve the problem, acm contest A weird clock marked from 0 to 59 has only a minute hand. It won t move until a special coin is thrown into its box. There are different kinds of coins as your options. However once you make your choice, you can not use any other kind. There are infinite number of coins of each kind, each marked with a number d (0 lt; = 1000), meaning that this coin will make the minute hand move clockwise d times the current time. For example, if the current time is 45, and d = 2. Then the minute hand will move clockwise 90 minutes and will be pointing to 15. Now you are given the initial time s (0 lt; s = lt; = 59) and the coin s type d. Write a program to find the minimum number of d-coins needed to turn the minute hand back to 0.
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