PHP implements ant pole climbing path algorithm

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Release: 2023-03-18 17:02:01
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This article mainly introduces the code of the ant pole climbing path algorithm implemented in PHP, analyzes the principle and implementation method of the ant pole climbing path algorithm in the form of a complete example, and involves related skills in PHP numerical calculation and array operations. I hope to be helpful.

The details are as follows:


 $i) { // 超出计算范围 return $directionArr; } if(0 == $directionArr[$i]) { // 当前位加1 $directionArr[$i] = 1; return $directionArr; } $directionArr[$i] = 0; return add2($directionArr, $count, $i - 1); // 进位 } $positionArr = array( // 所在位置 3, 7, 11, 17, 23 ); function path($positionArr) { // 生成测试路径 $pathCalculate = array(); $count = count($positionArr); $directionArr = array_fill(0, $count, 0); // 朝向 $end = str_repeat('1', $count); while (true) { $path = implode('', $directionArr); $pathArray = array_combine($positionArr, $directionArr); $total = calculate($positionArr, $directionArr); $pathCalculate['P'.$path] = $total; if($end == $path) { // 遍历完成 break; } $directionArr = add2($directionArr, $count, $count - 1); } return $pathCalculate; } function calculate($positionArr, $directionArr) { $total = 0; // 总用时 $length = 27; // 木杆长度 while ($positionArr) { $total++; // 步增耗时 $nextArr = array(); // 下一步位置 foreach ($positionArr as $key => $value) { if(0 == $directionArr[$key]) { $next = $value - 1; // 向0方向走一步 } else { $next = $value + 1; // 向1方向走一步 } if(0 == $next) { // 在0方向走出 continue; } if($length == $next) { // 在1方向走出 continue; } $nextArr[$key] = $next; } $positionArr = $nextArr; // 将$positionArr置为临时被查找数组 foreach ($nextArr as $key => $value) { $findArr = array_keys($positionArr, $value); if(count($findArr) < 2) { // 没有重合的位置 continue ; } foreach ($findArr as $findIndex) { $directionArr[$findIndex] = $directionArr[$findIndex] ? 0 : 1; // 反向处理 unset($positionArr[$findIndex]); // 防止重复查找计算 } } $positionArr = $nextArr; // 将$positionArr置为下一步结果数组 } return $total; } $pathCalculate = path($positionArr); echo '
calculate-'; print_r($pathCalculate); echo 'sort-'; asort($pathCalculate); print_r($pathCalculate);
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