Package g2201_2300.s2283_check_if_number_has_equal_digit_count_and_digit_value

Class Solution

  • public class Solution
extends Object
    2283 - Check if Number Has Equal Digit Count and Digit Value.

    Easy

    You are given a 0-indexed string num of length n consisting of digits.

    Return true if for every index i in the range 0 <= i < n, the digit i occurs num[i] times in num, otherwise return false.

    Example 1:

    Input: num = “1210”

    Output: true

    Explanation:

    num[0] = ‘1’. The digit 0 occurs once in num.

    num[1] = ‘2’. The digit 1 occurs twice in num.

    num[2] = ‘1’. The digit 2 occurs once in num.

    num[3] = ‘0’. The digit 3 occurs zero times in num.

    The condition holds true for every index in “1210”, so return true.

    Example 2:

    Input: num = “030”

    Output: false

    Explanation:

    num[0] = ‘0’. The digit 0 should occur zero times, but actually occurs twice in num.

    num[1] = ‘3’. The digit 1 should occur three times, but actually occurs zero times in num.

    num[2] = ‘0’. The digit 2 occurs zero times in num.

    The indices 0 and 1 both violate the condition, so return false.

    Constraints:

    • n == num.length
    • 1 <= n <= 10
    • num consists of digits.

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • digitCount

        public boolean digitCount​(String num)