class Solution {
public:
    bool detectCapitalUse(string word) {
        bool flag = false;
        int cnt = 0;
        for(int i=0; i<word.size(); i++)
        {
            char ch = word[i];
            if(ch>=‘A‘&&ch<=‘Z‘) cnt++;
        }
        if(cnt==word.size() || (cnt==1&& word[0]>=‘A‘&&word[0]<=‘Z‘) || cnt==0) //err
        {
            flag = true;
        }
        return flag;
    }
};