leetcode520. Detect Capital

class Solution {public:    bool detectCapitalUse(string word) {        int n=word.size();        int k=0;        if(word[0]>='A'&&word[0]<='Z') k=1;        int k2=0,k3=0;        for(int i=1;i<n;i++){            if(word[i]>='A'&&word[i]<='Z') k2=1;            else k3=1;        }        if(k&&k2==0) return true;        if(k&&k3==0) return true;        if(k==0&&k2==0) return true;        return false;    }};