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JavaStack.java
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JavaStack.java
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import java.util.*;
class JavaStack{
public static void main(String []argh)
{
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
String input=sc.next();
System.out.println((balancedParenthensies(input)));
}
}
public static boolean balancedParenthensies(String s) {
Stack<Character> stack = new Stack<Character>();
for(int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if(c == '[' || c == '(' || c == '{' ) {
stack.push(c);
} else if(c == ']') {
if(stack.isEmpty() || stack.pop() != '[') {
return false;
}
} else if(c == ')') {
if(stack.isEmpty() || stack.pop() != '(') {
return false;
}
} else if(c == '}') {
if(stack.isEmpty() || stack.pop() != '{') {
return false;
}
}
}
return stack.isEmpty();
}
}