class Solution {
public:
    bool detectCapitalUse(string word) {
    auto n=word.size();
	if(n==0) return false;
	int flag1=-1, flag2=-1;
	for(int i=1; i<n; i++)
	{
		if(word[i]>=65 && word[i]<=91)
			flag1=0;
		if(word[i]>=97 && word[i]<=122)
			flag2=0;
	}
	if(flag1==0 && flag2==0 || word[0]>=97 && word[0]<=122 && flag1==0)
		return false;
	else return true;   
    }
};