Leetcode 482 Solution

This article provides solution to leetcode question 482 (license-key-formatting)
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https://leetcode.com/problems/license-key-formatting

Solution

class Solution {
public:
    string licenseKeyFormatting(string S, int K) {
        string t;
        int cnt = 0;

        for (int i = S.size() - 1; i >= 0; i--)
        {
            if (S[i] == '-')
                continue;

            if (cnt != 0 && cnt % K == 0)
                t += "-";

            t += toupper(S[i]);

            cnt++;
        }

        reverse(t.begin(), t.end());

        return t;
    }
};