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public class SqStack {
private int size;
private Object[] datas;
private int top;
public SqStack(){
this(50);
size = 50;
}
public SqStack(int size) {
this.size = size;
datas = new Object[size];
top = -1;
}
public void push(Object data){
//...
}
public Object pop(){
//...
}
public Object getTop(){
//...
}
public boolean isEmpty(){
//...
}
}
public static boolean isStackOutSequence(String str){
SqStack s=new SqStack();
for(int i=0;i<str.length();i++){
for(int j=i+1;j<str.length();j++){
if(str.charAt(j)<str.charAt(i)){
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