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Copy pathQ20_ValidParentheses.java
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39 lines (37 loc) · 885 Bytes
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Copy pathQ20_ValidParentheses.java
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39 lines (37 loc) · 885 Bytes
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package leetcode;
public class Q20_ValidParentheses {
public static boolean isValid(String s) {
StringBuffer ss = new StringBuffer();
for(int i=0; i<s.length(); i++){
char c = s.charAt(i);
switch (c) {
case '{':
case '[':
case '(':
ss.append(c);
break;
case '}':
if ((ss.length()>0)&&(ss.charAt(ss.length()-1))=='{')
ss.deleteCharAt(ss.length()-1);
else return false;
break;
case ']':
if ((ss.length()>0)&&(ss.charAt(ss.length()-1))=='[')
ss.deleteCharAt(ss.length()-1);
else return false;
break;
case ')':
if ((ss.length()>0)&&(ss.charAt(ss.length()-1))=='(')
ss.deleteCharAt(ss.length()-1);
else return false;
break;
default:
return false;
}
}
return ss.length()==0?true:false;
}
public static void main(String[] args) {
System.out.println(isValid("{{{[]{{}}()}}"));
}
}