709. To Lower Case

發表於 | 分類於

problem

solution

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class Solution {
public:
    string toLowerCase(string s) {
        string str;
        for(char c: s){
            if(c>='A' && c<='Z') c+=32;
            str+=c;
        }
        return str;
    }
};

analysis

  • time complexity O(n)
  • space complexity O(1)