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2 months ago
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class Solution {
public:
    string clearDigits(string s) {
        string ans;

        for(int i=0;i<s.size();i++) {
            if(s[i] >= '0' && s[i] <= '9') {
                if(!ans.empty()) {
                    ans.pop_back();
                }
            } else {
                ans+=s[i];
            }
        }

        

        return ans;
    }
};
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