You are given a list of prices, where price [ i ] is the price of a given stock on the i th day
Write a program to print the maximum profit by choosing a single day to buy a stock and choosing a different day in the future to sell that stock
If there is no profit that can be achived return 0
Input:
The input is a single line containing space - separated integers
output:
The output should be a an integer
sample Input1:
7 1 5 3 6 4
sampleoutput1:
5
sampleinput2:
1 11 13 21 19
sample output2:
20