/**
* Computes the median of three integers.
* The median is the value that is neither the minimum nor the maximum.
*
* Formula:
* median = a + b + c - min(a, b, c) - max(a, b, c)
*/
function medianOfThreeNumbers(int $a, int $b, int $c): int
{
// Determine the minimum of the three numbers
$min = $a;
if ($b < $min) $min = $b;
if ($c < $min) $min = $c;
// Determine the maximum of the three numbers
$max = $a;
if ($b > $max) $max = $b;
if ($c > $max) $max = $c;
// The median is the remaining value
return $a + $b + $c - $min - $max;
}
// Test cases
echo "The median of [1, 1, 1] is " . medianOfThreeNumbers(1, 1, 1) . PHP_EOL;
echo "The median of [10, 3, 7] is " . medianOfThreeNumbers(10, 3, 7) . PHP_EOL;
echo "The median of [10, -10, -10] is " . medianOfThreeNumbers(10, -10, -10) . PHP_EOL;
echo "The median of [3, 3, 5] is " . medianOfThreeNumbers(3, 3, 5) . PHP_EOL;
/*
run:
The median of [1, 1, 1] is 1
The median of [10, 3, 7] is 7
The median of [10, -10, -10] is -10
The median of [3, 3, 5] is 3
*/
