{ "data": { "question": { "questionId": "2377", "questionFrontendId": "2283", "boundTopicId": null, "title": "Check if Number Has Equal Digit Count and Digit Value", "titleSlug": "check-if-number-has-equal-digit-count-and-digit-value", "content": "

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

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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.

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Example 1:

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\nInput: num = "1210"\nOutput: true\nExplanation:\nnum[0] = '1'. The digit 0 occurs once in num.\nnum[1] = '2'. The digit 1 occurs twice in num.\nnum[2] = '1'. The digit 2 occurs once in num.\nnum[3] = '0'. The digit 3 occurs zero times in num.\nThe condition holds true for every index in "1210", so return true.\n
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Example 2:

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\nInput: num = "030"\nOutput: false\nExplanation:\nnum[0] = '0'. The digit 0 should occur zero times, but actually occurs twice in num.\nnum[1] = '3'. The digit 1 should occur three times, but actually occurs zero times in num.\nnum[2] = '0'. The digit 2 occurs zero times in num.\nThe indices 0 and 1 both violate the condition, so return false.\n
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Constraints:

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