Score : 400 points
One day, Snuke was given a permutation of length N, a_1, a_2, ..., a_N, from his friend.
Find the following:
The input is given from Standard Input in the following format:
N a_1 a_2 ... a_N
Print the answer.
Note that the answer may not fit into a 32-bit integer.
3 2 1 3
9
4 1 3 2 4
19
8 5 4 8 1 2 6 7 3
85