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What is the first value that is searched for in an array when using a selection sort algorithm?
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∙ 14y ago
The first value is marked first, and then the smallest value is searched to compare to the first and then place in the appropriate location.
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∙ 14y ago
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Find largest value algorithm in c?
** pseudo code ** if array length == 1, return first element else if array length > 1 max = first element for second item to last item if item > max max = item return max else // array length is 0 error
What is mean by selection sort?
Selection sort works by looking for the largest value in a set and swapping it with the last value. The last value can now be ignored since it is now in place. The process repeats with the remainder of the set. After repeated passes, the remainder of the set will have only one item, the smallest value, at which point all the values will be in sorted order. The algorithm is similar to that of bubblesort, but is generally more efficient because there can only be one swap at most for each iteration of the algorithm. With bubble sort, there may be multiple swaps per iteration. However, while the number of comparisons is the same for both algorithms, bubblesort can be optimised to minimise the number of iterations required and thus minimise the number of comparisons. Nevertheless, swapping is a more expensive operation than comparing, thus selection sort is generally faster. Neither algorithm is suitable for sorting large sets of data.
What algorithm uses a loop to step through each element of an array starting with the first element searching for a value?
What you're describing is called a sequential search or linear search.
Explain first fit algorithm?
A "first fit" algorithm is any algorithm which doesn't care about how "good" a solution is, it just returns the first one that works.
Which algorithm is preferable to find a specific number from unsorted array?
If the array is unsorted then there is no algorithm that can be applied other than a sequential traversal from one end of the array to the other until the number is found or the end of the array is reached. This is an extremely poor algorithm as the worst case would be O(n) for n elements. While this may be fine for small arrays, it is highly inefficient for larger arrays. To apply a more efficient algorithm with a worst case of O(log n), you must sort the array. You can then use a binary search algorithm by starting at the middle element. If that's your value, you're done. If not and the value you seek is less than this value, then you can eliminate all the elements in the upper half of the array, otherwise you can eliminate all the elements in the lower half of the array. Repeat the process with the remaining subarray, reducing the number of remaining elements by half each time. If you end up with a subarray with no elements then the value does not exist. Sorted arrays that are perfectly balanced offer the best performance. For instance, an array with 63 elements is perfectly balanced because after the first iteration you are left with another perfectly balanced array of 31 elements (because you eliminated 31 elements plus the middle element). After the next iteration you will be left with 15 elements, then 7, 3, 1 and finally 0. Thus a 63-element array takes no more than 6 iterations to determine that a value does not exist, compared to 63 iterations with a sequential traversal search upon an unsorted array. 6 iterations is also the average because the 6th iteration can locate any one of 32 values, which is more than half the values.
Who introduce selection sorting algorithm?
in selection sorting at first we take first element of the list and start comparing with all the successive element of that list
As organisms first evolved how did natural selection contribute to biodiversity?
i dont know thats why i searched it here wey
Find largest value algorithm in c?
** pseudo code ** if array length == 1, return first element else if array length > 1 max = first element for second item to last item if item > max max = item return max else // array length is 0 error
What is mean by selection sort?
Selection sort works by looking for the largest value in a set and swapping it with the last value. The last value can now be ignored since it is now in place. The process repeats with the remainder of the set. After repeated passes, the remainder of the set will have only one item, the smallest value, at which point all the values will be in sorted order. The algorithm is similar to that of bubblesort, but is generally more efficient because there can only be one swap at most for each iteration of the algorithm. With bubble sort, there may be multiple swaps per iteration. However, while the number of comparisons is the same for both algorithms, bubblesort can be optimised to minimise the number of iterations required and thus minimise the number of comparisons. Nevertheless, swapping is a more expensive operation than comparing, thus selection sort is generally faster. Neither algorithm is suitable for sorting large sets of data.
What algorithm uses a loop to step through each element of an array starting with the first element searching for a value?
What you're describing is called a sequential search or linear search.
What is the algorithm for find the first biggest and second biggest of a list of numbers?
Here's a way to do it in pseudo-code:create an array with two elementsif the first number in the provided list is greater than the second one assign the first one to the first array elementassign the second one to the second array elementelse assign the first one to the second array elementassign the second one to the first array elementfor every other number in the list if the number is greater than the first element in the array swap their valuesif the number is greater than the second element in the array assign it to the second elementAnd that's it. You may notice that this algorithm will work no matter how many of the largest numbers you're looking for. Here's an example of how to do it in PHP:
Explain first fit algorithm?
A "first fit" algorithm is any algorithm which doesn't care about how "good" a solution is, it just returns the first one that works.
Which algorithm is preferable to find a specific number from unsorted array?
If the array is unsorted then there is no algorithm that can be applied other than a sequential traversal from one end of the array to the other until the number is found or the end of the array is reached. This is an extremely poor algorithm as the worst case would be O(n) for n elements. While this may be fine for small arrays, it is highly inefficient for larger arrays. To apply a more efficient algorithm with a worst case of O(log n), you must sort the array. You can then use a binary search algorithm by starting at the middle element. If that's your value, you're done. If not and the value you seek is less than this value, then you can eliminate all the elements in the upper half of the array, otherwise you can eliminate all the elements in the lower half of the array. Repeat the process with the remaining subarray, reducing the number of remaining elements by half each time. If you end up with a subarray with no elements then the value does not exist. Sorted arrays that are perfectly balanced offer the best performance. For instance, an array with 63 elements is perfectly balanced because after the first iteration you are left with another perfectly balanced array of 31 elements (because you eliminated 31 elements plus the middle element). After the next iteration you will be left with 15 elements, then 7, 3, 1 and finally 0. Thus a 63-element array takes no more than 6 iterations to determine that a value does not exist, compared to 63 iterations with a sequential traversal search upon an unsorted array. 6 iterations is also the average because the 6th iteration can locate any one of 32 values, which is more than half the values.
Passing an array name to a pointer assigns the first memory location of the array to the pointer variable?
Yes, passing an array name to a pointer assigns the first memory location of the array to the pointer variable. An array name is the same as a pointer to the first location of the array, with the exception that an array name is a r-value, while a pointer is an l-value.
How will you Write a c program to find the kth smallest element in an array in c?
//This is for kth largest element. (So this is for n-k smallest element) //Sudipta Kundu [Wipro Technologies] #include <stdio.h> //Input: array with index range [first, last) //Output: new index of the pivot. An element in the middle is chosen to be a pivot. Then the array's elements are //placed in such way that all elements <= pivot are to the left and all elements >= pivot are to the right. int positionPivot(int* array, int first, int last); //Input: array with index range [first, last) and integer K (first <= K < last) //Output: array whose Kth element (i.e. array[K]) has the "correct" position. More precisely, //array[first ... K - 1] <= array[K] <= array[K + 1 ... last - 1] void positionKthElement(int* array, int first, int last, int k); int main() { int array[] = {7,1,8,3,1,9,4,8}; int i; for (i = 0; i < 8; i++) { positionKthElement(array, 0, sizeof(array) / sizeof(array[0]),i); printf("%d is at position %d\n", array[i], i); } return 0; } int positionPivot(int* array, int first, int last) { if (first last) return first; int tmp = (first + last) / 2; int pivot = array[tmp]; int movingUp = first + 1; int movingDown = last - 1; array[tmp] = array[first]; array[first] = pivot; while (movingUp <= movingDown) { while (movingUp <= movingDown && array[movingUp] < pivot) ++movingUp; while (pivot < array[movingDown]) --movingDown; if (movingUp <= movingDown) { tmp = array[movingUp]; array[movingUp] = array[movingDown]; array[movingDown] = tmp; ++movingUp; --movingDown; } } array[first] = array[movingDown]; array[movingDown] = pivot; return movingDown; } void positionKthElement(int* array, int first, int last, int k) { int index; while ((index = positionPivot(array, first, last)) != k) { if (k < index) last = index; else first = index + 1; } }
An algorithm to find whether a directed graph is connected or not?
You can use a The Depth-First Search algorithm.
How do you return an array from function?
By returning a pointer to the first element of the array.
