PHP Program for Mean of range in array
Last Updated :
22 Jul, 2024
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Given an array of n integers. You are given q queries. Write a program to print the floor value of mean in range l to r for each query in a new line.
Examples :
Input : arr[] = {1, 2, 3, 4, 5}
q = 3
0 2
1 3
0 4
Output : 2
3
3
Here for 0 to 2 (1 + 2 + 3) / 3 = 2
Input : arr[] = {6, 7, 8, 10}
q = 2
0 3
1 2
Output : 7
7
Naive Approach:
We can run loop for each query l to r and find sum and number of elements in range. After this we can print floor of mean for each query.
<?php
// PHP program to find floor
// value of mean in range l to r
// To find mean of
// range in l to r
function findMean($arr, $l, $r)
{
// Both sum and count
// are initialize to 0
$sum = 0;
$count = 0;
// To calculate sum and
// number of elements in
// range l to r
for ($i = $l; $i <= $r; $i++)
{
$sum += $arr[$i];
$count++;
}
// Calculate floor
// value of mean
$mean = floor($sum / $count);
// Returns mean of array
// in range l to r
return $mean;
}
// Driver Code
$arr = array(1, 2, 3, 4, 5);
echo findMean($arr, 0, 2), "
";
echo findMean($arr, 1, 3), "
";
echo findMean($arr, 0, 4), "
";
// This code is contributed by ajit
?>
Output
2 3 3
Time Complexity: O(n).
Please refer complete article on Mean of range in array for more details!
