unu

Consider N a non-zero positive integer.

Task

Write a program that determines the square of the positive integer that is made up of N digits equal to 1.

Input Data

Input file unu.in contains on the first line the positive integer N

Output Data

Output file unu.out will contain a single line with the square of the positive integer that is made up of N digits equal to 1.

Restrictions

• 0 < N < 100000

Time limit: 0.1 seconds/test

prof. Sergiu Corlat
Moldavian-Turkish High School, Chişinău, Republic of Moldova
Contact:scorlat@gmail.com