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close #4204
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acbin
2023-06-09 18:52:05 +08:00
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parent ad03086f54
commit 00282efd8b
521 changed files with 5233 additions and 7309 deletions
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57
src/main/java/com/thealgorithms/searches/OrderAgnosticBinarySearch.java
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@ -1,6 +1,6 @@
package com.thealgorithms.searches;
//URL: https://www.geeksforgeeks.org/order-agnostic-binary-search/
// URL: https://www.geeksforgeeks.org/order-agnostic-binary-search/
/* Order Agnostic Binary Search is an algorithm where we do not know whether the given
sorted array is ascending or descending order.
@ -11,37 +11,36 @@ package com.thealgorithms.searches;
Depending upon the condition, respective statements will be executed and we will get our answer.
*/
public class OrderAgnosticBinarySearch {
public class OrderAgnosticBinarySearch {
static int BinSearchAlgo(int[] arr, int start, int end, int target) {
static int BinSearchAlgo(int[] arr, int start, int end, int target) {
// Checking whether the given array is ascending order
boolean AscOrd = arr[start] < arr[end];
// Checking whether the given array is ascending order
boolean AscOrd = arr[start] < arr[end];
while (start <= end) {
int middle = start + (end - start) / 2;
while (start <= end) {
int middle = start + (end - start) / 2;
// Check if the desired element is present at the middle position
if (arr[middle] == target)
return middle; // returns the index of the middle element
// Check if the desired element is present at the middle position
if (arr[middle] == target) return middle; // returns the index of the middle element
// Ascending order
if (AscOrd) {
if (arr[middle] < target)
start = middle + 1;
else
end = middle - 1;
}
// Ascending order
if (AscOrd) {
if (arr[middle] < target)
start = middle + 1;
else
end = middle - 1;
}
// Descending order
else {
if (arr[middle] > target)
start = middle + 1;
else
end = middle - 1;
}
}
// Element is not present
return -1;
}
}
// Descending order
else {
if (arr[middle] > target)
start = middle + 1;
else
end = middle - 1;
}
}
// Element is not present
return -1;
}
}