You are given an array. Each element represents the price of a stock on that particular day. Calculate and return the maximum profit you can make from buying and selling that stock only once.

buyAndSell.ts

const buy_and_sell = (values:number[]):number => {
    let maxProfit = 0;
    let minPrice = Number.MAX_SAFE_INTEGER;
    for(let val of values){
        if(val<minPrice) {
            minPrice = val;
        }else if(val - minPrice > maxProfit){
             maxProfit = val - minPrice;
        }
    }
    return maxProfit;
}