Binary associativity
Practice
3.6 (51 votes)
Basic programming
Basics of implementation
Easy
Implementation
Problem
33% Success 8831 Attempts 10 Points 1s Time Limit 256MB Memory 1024 KB Max Code

A binary operation \(*\) on a set \(S\) is called associative if it satisfies the associative law: \((x * y) * z = x * (y * z)\) for all \(x\), \(y\)\(z\) in \(S\).

For the binary set \(S = \{0, 1\}\) and a particular binary operator \(*\), you are given its truth table. Determine if the operation is associative.

\(a\) \(b\) \(a * b\)
\(0\) \(0\) \(c_{0}\)
\(0\) \(1\) \(c_{1}\)
\(1\) \(0\) \(c_{2}\)
\(1\) \(1\) \(c_{3}\)

Input format

  • First line: A single integer \(T\) denoting the number of test cases

  • For each test case:

    • First line: Four space-separated integers \(c_{0}, c_{1}, c_{2}, c_{3}\)

Output format

For each test case, print 'Yes' (without quotes) in a new line if the binary operation is associative in nature. Otherwise, print 'No' (without quotes).

Constraints

\(1 \le T \le 8\)

\(c_0, c_1, c_2, c_3 \in \{ 0, 1 \}\)

 

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