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StackWithMinMethod.java

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import java.util.Stack;

/**

* ½£Ö¸Offer£¬°üº¬minº¯ÊýµÄÕ»

*/

public class StackWithMinMethod {

Stack<Integer> data = new Stack<>();

Stack<Integer> mins = new Stack<>();

public void push(int node) {

data.push(node);

if (mins.isEmpty() || node <= mins.peek()) {

mins.push(node);

}else {

mins.push(mins.peek());

}

}

public void pop() {

data.pop();

mins.pop();

}

public int top() {

return data.peek();

}

public int min() {

return mins.peek();

}

}