solution.ts

/*
 * @lc app=leetcode id=155 lang=javascript
 *
 * [155] Min Stack
 */

// @lc code=start
/**
 * initialize your data structure here.
 */
var MinStack = function () {
  // * ['104 ms', '77.21 %', '44.3 MB', '50 %']

  // @ts-ignore
  this.stack = [];
  // @ts-ignore
  this.minStack = [Infinity];
};

/**
 * @param {number} x
 * @return {void}
 */
MinStack.prototype.push = function (x: number) {
  this.stack.push(x);
  this.minStack.push(Math.min(x, this.getMin()));
};

/**
 * @return {void}
 */
MinStack.prototype.pop = function () {
  this.stack.pop();
  this.minStack.pop();
};

/**
 * @return {number}
 */
MinStack.prototype.top = function () {
  return this.stack[this.stack.length - 1];
};

/**
 * @return {number}
 */
MinStack.prototype.getMin = function () {
  return this.minStack[this.minStack.length - 1];
};

/**
 * Your MinStack object will be instantiated and called as such:
 * var obj = new MinStack()
 * obj.push(x)
 * obj.pop()
 * var param_3 = obj.top()
 * var param_4 = obj.getMin()
 */
// @lc code=end

export { MinStack };