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38 lines (30 loc) · 496 Bytes
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Copy pathMinStack.java
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38 lines (30 loc) · 496 Bytes
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import java.util.Stack;
public class MinStack
{
Stack<Integer> stack = new Stack<Integer>();
Stack<Integer> minStack = new Stack<Integer>();
public void push(int x)
{
if (minStack.isEmpty() || x < minStack.peek())
{
minStack.push(x);
}
stack.push(x);
}
public void pop()
{
if (stack.peek().equals(minStack.peek()))
{
minStack.pop();
}
stack.pop();
}
public int top()
{
return stack.peek();
}
public int getMin()
{
return minStack.peek();
}
}