Module: Conditional operator


Problem

11 /17


System of equations

Problem

Write a program for calculating y by the formula.

\(\begin{equation*} y(x) = \begin{cases} 0 &\text{at x = 0}\\ x^2-x-1 &\text{in other cases} \end{cases} \end{equation*}\)

Input format
Given one integer x (0 <= x <= 100).

Output fromat
Output one number - y. 
 
Example
N Input Output
1 2 1

time 1000 ms
memory 256 Mb
Rules for program design and list of errors in automatic problem checking

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