MinStack

class MinStack {
    constructor() {
        this.result = [];
        this.min = Number.MAX_SAFE_INTEGER;
    }

    push(x) {
        this.result.push(x)
        this.min = Math.min(x, this.min);
    };

    pop() {
        let val = this.result.pop()
        if (val === this.min) {
            this.min = Math.min(...this.result);
        }
    };

    top() {
        return this.result[this.result.length - 1];
    };

    getMin() {
        return this.min;
    };
}