520. Detect Capital
Given a word, you need to judge whether the usage of capitals in it is right or not.
We define the usage of capitals in a word to be right when one of the following cases holds:
- All letters in this word are capitals, like "USA".
- All letters in this word are not capitals, like "leetcode".
- Only the first letter in this word is capital if it has more than one letter, like "Google".
Otherwise, we define that this word doesn't use capitals in a right way.
Example 1:
Input: "USA"
Output: True
Example 2:
Input: "FlaG"
Output: False
Note:The input will be a non-empty word consisting of uppercase and lowercase latin letters.
题目中定义了三种规则,1.全部为大写字母,2.全部为小写字母,3.第一个字母为大写字母。判断给定word是否满足其中一项规则
class Solution {
public boolean detectCapitalUse(String word) {
int cnt = 0;
for(char c:word.toCharArray())
if(c <= 'Z') //大写
cnt ++;
if((cnt == 0|| cnt==word.length()) || (cnt==1 && word.charAt(0) <= 'Z'))
return true;
return false;
}
}
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