Created
September 16, 2016 14:56
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Balanced parenthesis Create function that will determine are the parenthesis balanced in a given string
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public class BalacedBrackets { | |
public static void main(String[] args) { | |
Scanner in = new Scanner(System.in); | |
int t = in.nextInt(); | |
for(int a0 = 0; a0 < t; a0++){ | |
String s = in.next(); | |
getResult(s); | |
} | |
} | |
private static void getResult(String text){ | |
int wrong_position = -1; | |
Stack<Bracket> opening_brackets_stack = new Stack<Bracket>(); | |
for (int position = 0; position < text.length(); ++position) { | |
char next = text.charAt(position); | |
if (next == '(' || next == '[' || next == '{') { | |
opening_brackets_stack.add(new Bracket(next, position)); | |
} | |
if ((next == ')' || next == ']' || next == '}')) { | |
if (!opening_brackets_stack.empty()) { | |
Bracket pop = opening_brackets_stack.pop(); | |
if (!pop.Match(next)) { | |
wrong_position = position + 1; | |
break; | |
} | |
} else { | |
wrong_position = position + 1; | |
break; | |
} | |
} | |
} | |
if (wrong_position == -1 && opening_brackets_stack.empty()) { | |
System.out.println("YES"); | |
} else { | |
System.out.println("NO"); | |
} | |
} | |
} | |
class Bracket { | |
Bracket(char type, int position) { | |
this.type = type; | |
this.position = position; | |
} | |
boolean Match(char c) { | |
if (this.type == '[' && c == ']') | |
return true; | |
if (this.type == '{' && c == '}') | |
return true; | |
if (this.type == '(' && c == ')') | |
return true; | |
return false; | |
} | |
char type; | |
int position; | |
} |
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