#1615Medium#13 in Snap's list· asked at 22 companies
Remove K Digits
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What we know
Example 1
Input: num = "1432219", k = 3 Output: "1219"
Example 2
Input: num = "10200", k = 1 Output: "200"
Remove the leading 1 and drop the leading zeros.
Example 3
Input: num = "10", k = 2 Output: "0"
Constraints
- •
1 <= k <= num.length <= 10^5 - •
numconsists of only digits. - •
numdoes not have any leading zeros except for the zero itself.