Added Code and Algo

Author: akshatprogrammer

BestTimeToBuyStock.cpp

@@ -0,0 +1,41 @@
+#include<iostream>
+#include<algorithm>
+using namespace std;
+int main(){
+    int n;
+    cin >> n;
+    int prices[n];
+   // int fake[n];
+    int mini;
+    int flag_mini=0;
+    for(int i=0;i<n;i++){
+        cin >> prices[i];
+     //   fake[i] = prices[i];
+    }
+    mini = prices[0];
+    for(int i=0;i<n;i++){
+        if(prices[i]<mini){
+            mini=prices[i];
+            flag_mini=i;
+        }
+    }
+    if(flag_mini == n-1){
+        cout << "0" << endl;
+        exit(-1);
+
+    }
+    int maxi=mini;
+    int flag_maxi=0;
+    for(int i=flag_mini;i<n;i++){
+        if(prices[i]>maxi){
+            maxi = prices[i];
+            flag_maxi=i;
+        }
+    }
+
+    cout << prices[flag_maxi]-prices[flag_mini] << endl;
+
+
+
+return 0;
+}