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Programming Articles
Page 226 of 2547
How to access and modify the values of a Tensor in PyTorch?
We use Indexing and Slicing to access the values of a tensor. Indexing is used to access the value of a single element of the tensor, whereas Slicing is used to access the values of a sequence of elements. We use the assignment operator to modify the values of a tensor. Assigning new value/s using the assignment operator will modify the tensor with new value/s. Steps Import the required libraries. Here, the required library is torch. Define a PyTorch tensor. Access the value of a single element ...
Read MoreHow to convert an image to a PyTorch Tensor?
PyTorch tensors are n-dimensional arrays that can leverage GPU acceleration for faster computations. Converting images to tensors is essential for deep learning tasks in PyTorch, as it allows the framework to process image data efficiently on both CPU and GPU. To convert an image to a PyTorch tensor, we use transforms.ToTensor() which automatically handles scaling pixel values from [0, 255] to [0, 1] and changes the dimension order from HxWxC (Height x Width x Channels) to CxHxW (Channels x Height x Width). Method 1: Converting PIL Images The most common approach is using PIL (Python Imaging Library) ...
Read MoreProgram to find coefficients of linear equations that has only one solution in Python
In this tutorial, we'll learn how to find the number of coefficient pairs (a, b) where a < b, such that the linear equation a*x + b*y = n has at least one integer solution. For a linear Diophantine equation a*x + b*y = n to have integer solutions, the greatest common divisor (GCD) of a and b must divide n. Our goal is to count valid pairs efficiently. Example If n = 4, the valid pairs are: (1, 2): equation 1*x + 2*y = 4 has solutions like x=2, y=1 (1, 3): equation 1*x ...
Read MoreProgram to find number m such that it has n number of 0s at end in Python
Suppose we have a number n. We have to find the smallest number m, such that factorial of m has at least n number of trailing zeros. So, if the input is like n = 2, then the output will be 10 because 10! = 3628800 has 2 trailing zeros and 9! = 362880 has only 1 trailing zero, so the minimum number with at least 2 zeros is 10. Understanding the Problem Trailing zeros in a factorial are created by factors of 10, which come from pairs of factors 2 and 5. Since there are always ...
Read MoreProgram to find hoe many children will get candies while distributing them maintaining the rules in Python
Suppose we have k number of candies to distribute among children following specific rules. This problem requires finding the maximum number of children who can receive candies while maintaining distribution constraints. Distribution Rules The ith child will get i² number of candies Children must be served in order − child at index i cannot get candies until all children from index 1 to i−1 are served If the ith child cannot get exactly i² candies, the distribution stops Example Walkthrough If k = 20, the distribution works as follows ? 1st child ...
Read MoreProgram to find remainder after dividing n number of 1s by m in Python
Suppose we have two numbers n and m. We have to find the remainder after dividing n number of 1s by m. So, if the input is like n = 4 and m = 27, then the output will be 4, because 1111 mod 27 = 4. Understanding the Problem When we have n number of 1s, we create a number like: n = 1: Number is 1 n = 2: Number is 11 n = 3: Number is 111 ...
Read MoreProgram to find number of pairs from N natural numbers whose sum values are divisible by k in Python
Suppose we have a number n and another value k. We need to find the total number of pairs from the first N natural numbers whose sum is divisible by k. Given an array A with first N natural numbers [1, 2, 3, ..., n], we have to find pairs A[i] and A[j] where i < j and (A[i] + A[j]) % k == 0. Example If n = 10 and k = 4, the output will be 10 because there are 10 pairs whose sum is divisible by 4: [(1, 3), (1, 7), (2, 6), ...
Read MoreProgram to find common fraction between min and max using given constraint in Python
Finding the best rational approximation to π (pi) within given constraints is a classic problem in number theory. We need to find a fraction n/d where the denominator d falls between minimum and maximum values, and the fraction is as close to π as possible. Problem Statement Given two integers minimum and maximum, find a common fraction n/d such that: min ≤ d ≤ max |n/d - π| is minimized If multiple fractions satisfy this condition, return the one with the smallest denominator Algorithm Overview The solution uses the Farey sequence approach to ...
Read MoreProgram to find probability that any proper divisor of n would be an even perfect square number in Python
Given a number n, we need to find the probability that any proper divisor of n would be an even perfect square number. A proper divisor is any positive divisor of n except n itself. So, if the input is like n = 36, then the output will be 1/8 because there are eight proper divisors of 36, these are {1, 2, 3, 4, 6, 9, 12, 18} and among them only one number (4) is both a perfect square and even. Algorithm To solve this, we will follow these steps − If n mod ...
Read MoreProgram to find value of find(x, y) is even or odd in Python
Given an array nums and a pair (x, y), we need to determine whether the value of find(x, y) is odd or even. The find() function is defined recursively: find(x, y) = 1 if x > y find(x, y) = nums[x] ^ find(x+1, y) otherwise Where ^ represents the XOR (exclusive OR) operation. Understanding the Problem Let's trace through an example with nums = [3, 2, 7] and (x, y) = (1, 2): find(1, 2) = nums[1] ^ find(2, 2) ...
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