leetcode_potd/1432 at main · G-Rajashekar/leetcode_potd · GitHub

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class Solution {
public:
    int maxDiff(int num) {
        string s=to_string(num);

        char maxReplace=' ';
        char minReplace=' ';
        char charToReplace=' ';
        string maxi="";
        string mini="";

        if (s[0]!='1'){
            minReplace=s[0];
            charToReplace='1';
        }
        else{
            charToReplace='0';
            for (int i=1;i<s.length();i++){
                if (s[i]!='0' && minReplace==' ' && s[i]!='1'){
                    minReplace=s[i];
                    break;
                }
            }
        }

        for (int i=0;i<s.length();i++){
            if (s[i]!='9' && maxReplace==' '){
                maxReplace=s[i];
                break;
            }
        }

        for (int i=0;i<s.length();i++){
            if (s[i]==minReplace){
                mini.push_back(charToReplace);
            }
            else{
                mini.push_back(s[i]);
            }

            if (s[i]==maxReplace){
                maxi.push_back('9');
            }
            else{
                maxi.push_back(s[i]);
            }
        }

        return stoi(maxi)-stoi(mini);
    }
};

TC:O(N)
SC:O(N)