8 lines java O(n) solution

  • 0

    We iterate right to left,computing the difference each time and assigning the max value to a variable.
    after that we check max value;

    public int maxProfit(int[] prices) {
            return 0;
            int maxDiff=0,max=prices[prices.length-1];
            for(int k=prices.length-1;k>=0&&prices.length>=2;k--){
                maxDiff = Math.max(max-prices[k],maxDiff);
                max = Math.max(max,prices[k]);
            return maxDiff;

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