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Discussion in 'run-around-can-you-close-the-loop' started by Asim - Apr 15th, 2023 4:13 am.
Asim
Asim
  • Start by identifying the number of digits in the input number. If the input number has n digits, then the number can only have digits between 1 and n.
  • Create a visited array of size n and initialize it with all zeros. This array will keep track of the digits that have already been visited.
  • Start at the first digit of the input number and mark it as visited.
  • Using the value of the current digit, determine the index of the next digit to visit by wrapping around to the beginning if necessary. For example, if the current digit is 4 and the input number is 1234, then the index of the next digit to visit would be (0 + 4) % 4 = 0.
  • If the next digit to visit has already been visited, then the number is not a valid run-around number. Otherwise, mark the next digit as visited and repeat step 4 until all digits have been visited exactly once.
  • If all digits have been visited exactly once and the current index is back to the first digit, then the number is a valid run-around number. Otherwise, it is not.
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