PHP Exercises: Find the maximum sum of a contiguous subsequence from a given sequence of numbers a1, a2, a3, ... an
PHP: Exercise-57 with Solution
Write a PHP program to find the maximum sum of a contiguous subsequence from a given sequence of numbers a1, a2, a3, ... an. A subsequence of one element is also a continuous subsequence.
Input:You can assume that 1 ≤ n ≤ 5000 and -100000 ≤ ai ≤ 100000.
Input numbers are separated by a space.
Input 0 to exit.
Pictorial Presentation:

Sample Solution: -
PHP Code:
<?php
while($line = fgets(STDIN)){
$n = intval($line);
if($n == 0){
break;
}
$arr = array();
$max_val = array();
for($i = 0; $i < $n; $i++){
$x = intval(fgets(STDIN));
$arr[$i] = 0;
$max_val[$i] = -1000000;
for($j = 0; $j <= $i; $j++){
$arr[$j] += $x;
if($max_val[$j] < $arr[$j]){
$max_val[$j] = $arr[$j];
}
}
}
echo max($max_val)."\n";
}
?>
Sample Input:
6
-4
-2
5
3
8
Sample Output:
16
Flowchart:

PHP Code Editor:
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Previous: Write a PHP program to test whether two lines PQ and RS are parallel.
The four points are P(x1, y1), Q(x2, y2), R(x3, y3), S(x4, y4).
Next: Write a PHP program to test the specified Circumference of C1 and C2 intersect.
What is the difficulty level of this exercise?
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PHP: Tips of the Day
Mutates the original array to filter out the values specified
Example:
<?php function tips_pull(&$items, ...$params) { $items = array_values(array_diff($items, $params)); return $items; } $items = ['x', 'y', 'z', 'x', 'y', 'z']; print_r(tips_pull($items, 'y', 'z')); ?>
Output:
Array ( [0] => x [1] => x )
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