1. Hackathon Team
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

There are $$$n$$$ students in a class. The teacher has decided to form a team from among them to participate in a hackathon. The team can consist of anywhere from two to five members. The teacher now faces the challenging task of evaluating every possible team composition and selecting one. Write a program to calculate the number of different team compositions that the teacher will need to evaluate.

Input

A single integer $$$n$$$ is provided as input.

Output

Output a single integer — the answer.

Scoring

Subtask 1 (up to 50 points): $$$2 \le n \le 10$$$

Subtask 2 (up to 50 points): $$$10 \lt n \le 100$$$

Example
Input
3
Output
4