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MinStack.java
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50 lines (43 loc) · 785 Bytes
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package code.lintcode.stack;
public class MinStack {
public static void main(String[] args) {
MinStack stack = new MinStack();
stack.push(1);
stack.pop();
stack.push(2);
stack.push(3);
stack.min();
stack.push(1);
stack.min();
}
private int[] queue = new int[10];
private int[] minQueue = new int[10];
private int counter = 0;
public MinStack() {
}
/*
* @param number: An integer
*
* @return: nothing
*/
public void push(int number) {
queue[counter] = number;
int min = number;
if (counter != 0) {
min = Math.min(this.min(), min);
}
minQueue[counter++] = min;
}
/*
* @return: An integer
*/
public int pop() {
return queue[--counter];
}
/*
* @return: An integer
*/
public int min() {
return minQueue[counter];
}
}