Description

The German "Prince of Mathematics" Gauss solved his teacher Mr. Büttner's challenging problem at the age of 10: calculating the sum of all integers from 1 to 100.
Try writing a program to calculate the sum of 1 + 2 + 3 + 4 + 5.

Input Format

None

Output Format

The sum of 1 + 2 + 3 + 4 + 5.

Sample

None

1+2+3+4+5=15