Digit Count Validation Algorithm
Intuition\nWe\'ll count the occurrences of each digit in the number and compare them with the digits themselves.\n\n# Approach\nWe\'ll create a function to coun
# Intuition\nWe\'ll count the occurrences of each digit in the number and compare them with the digits themselves.\n\n# Approach\nWe\'ll create a function to count the occurrences of each digit in the number. Then, we\'ll iterate through the number, checking if the count of each digit matches the digit itself.\n\n# Complexity\n- Time complexity: O(n), where n is the length of the input number.\n- Space complexity: O(n), for the map used to store the digit\n\n\n# Code\n```\nclass Solution {\n  // Function to check if the count of each digit in the number matches the digit itself\n  bool digitCount(String num) {\n    // Count the occurrences of each digit in the number\n    Map<int, int> count = counter(num);\n    // Iterate through the number\n    for (int i = 0; i < num.length; i++) {\n      // If the count of the digit doesn\'t match the digit itself, return false\n      if (count[i] != int.parse(num[i])) {\n        return false;\n      }\n    }\n    // If all counts match, return true\n    return true;\n  }\n\n  // Function to count occurrences of each digit in the number\n  Map<int, int> counter(String value) {\n    // Map to store counts of each digit\n    Map<int, int> digitCounts = {};\n    // Iterate through the number\n    for (int i = 0; i < value.length; i++) {\n      // Initialize count for the current digit\n      digitCounts[i] = 0;\n      // Count occurrences of the current digit in the number\n      for (int j = 0; j < value.length; j++) {\n        if (i == int.parse(value[j])) {\n          digitCounts[i] = digitCounts[i]! + 1;\n        }\n      }\n    }\n    // Return the counts of each digit\n    return digitCounts;\n  }\n}\n\n```
['Dart']