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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
14570 changed files with 153136 additions and 63871 deletions
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14
Task/Knapsack-problem-0-1/PHP/knapsack-problem-0-1-1.php
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@ -8,11 +8,9 @@
# PHP Translation from Python, Memoization,
# and index return functionality added by Brian Berneker
#
#It works uncorrectly! For examle if $aw=4. Max value is true, but no "Array Indices" and its parameters are displayed
#
#########################################################
function knapSolveFast2($w, $v, $i, $aW, &$m, &$pickedItems) {
function knapSolveFast2($w, $v, $i, $aW, &$m) {
global $numcalls;
$numcalls ++;
@ -40,18 +38,18 @@ function knapSolveFast2($w, $v, $i, $aW, &$m, &$pickedItems) {
// Not at end of decision branch..
// Get the result of the next branch (without this one)
list ($without_i,$without_PI) = knapSolveFast2($w, $v, $i-1, $aW,$m,$pickedItems);
list ($without_i, $without_PI) = knapSolveFast2($w, $v, $i-1, $aW, $m);
if ($w[$i] > $aW) { // Does it return too many?
$m[$i][$aW] = $without_i; // Memo without including this one
$m['picked'][$i][$aW] = array(); // and a blank array entry...
return array($without_i,array()); // and return it
$m['picked'][$i][$aW] = $without_PI; // and a blank array entry...
return array($without_i, $without_PI); // and return it
} else {
// Get the result of the next branch (WITH this one picked, so available weight is reduced)
list ($with_i,$with_PI) = knapSolveFast2($w, $v, ($i-1), ($aW - $w[$i]),$m,$pickedItems);
list ($with_i,$with_PI) = knapSolveFast2($w, $v, ($i-1), ($aW - $w[$i]), $m);
$with_i += $v[$i]; // ..and add the value of this one..
// Get the greater of WITH or WITHOUT
@ -81,7 +79,7 @@ $v4 = array(150,35,200,160,60,45,60,40,30,10,70,30,15,10,40,70,75,80,20,12,50,10
$numcalls = 0; $m = array(); $pickedItems = array();
## Solve
list ($m4,$pickedItems) = knapSolveFast2($w4, $v4, sizeof($v4) -1, 400,$m,$pickedItems);
list ($m4,$pickedItems) = knapSolveFast2($w4, $v4, sizeof($v4) -1, 400, $m);
# Display Result
echo "<b>Items:</b><br>".join(", ",$items4)."<br>";