add solution 122[js]

Author: limbowandering

solution/122.Best Time to Buy and Sell Stock II/Solution.js

@@ -0,0 +1,9 @@
+const maxProfit2 = function(prices){
+  let profit = 0;
+  for(let i = 1; i < prices.length; i++){
+    if(prices[i]-prices[i-1] > 0){
+      profit+=prices[i]-prices[i-1];
+    }
+  }
+  return profit;
+}