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Python Articles
Page 58 of 855
Program to find sum of unique elements in Python
Suppose we have an array nums with few duplicate elements and some unique elements. We have to find the sum of all the unique elements present in nums.So, if the input is like nums = [5, 2, 1, 5, 3, 1, 3, 8], then the output will be 10 because only unique elements are 8 and 2, so their sum is 10.To solve this, we will follow these steps −count := a dictionary holding all unique elements and their frequencyans := 0for each index i and value v in nums, doif count[v] is same as 1, thenans := ans + ...
Read MoreProgram to find minimum changes required for alternating binary string in Python
Suppose we have a binary string s. Let us consider an operation where we can flip one bit. The string s is called alternating string if no two adjacent characters are same. We have to find the minimum number of operations needed to make s alternating.So, if the input is like s = "11100011", then the output will be 3 because if we flip bits at position 1, 4 and 7, then, it will be "10101010", then all are alternating.To solve this, we will follow these steps −change := 0even_1 := 0, even_0 := 0odd_1 := 0, odd_0 := 0for ...
Read MoreProgram to find the root of a n-ary tree in Python
Suppose, we are given the nodes of an n-ary tree in an array. We have to find and return the root node of the tree by reconstructing it. The full tree has to be displayed from the returned node in preorder notation.So, if the input is likethen the output will be[14, 27, 32, 42, 56, 65]We will use the root of the tree to display the pre order traversal of the tree. So, the output is a pre order traversal of the tree.To solve this, we will follow these steps −indegree := a new map containing integer valuesfor each node ...
Read MoreProgram to find the diameter of a n-ary tree in Python
Suppose, we are given an n-ary tree and said to determine the diameter of the tree. The diameter of the tree is the longest path that is present between any two leaf nodes of the tree. We have to find out and return the integer value that represents the diameter of the tree.So, if the input is likethen the output will be 3.The diameter of this n-ary tree consists of the edges 27->14, 14->42, and 42->56 or 42->65 (marked in the diagram by red lines). The path length is 3.To solve this, we will follow these steps −ans := 1Define ...
Read MoreProgram to find out if the strings supplied differ by a character in the same position in Python
Suppose, we are provided an array that contains several strings that are of the same length. We have to find out if any two of the supplied strings differ by a single character at the same position. If this difference is present, we return true or else we return false.So, if the input is like dict = ['pqrs', 'prqs', 'paqs'], then the output will be True. The output produced is True because the strings listed in the input all differ in index 1. So, if any two pairs are taken, there is a difference in the same position.To solve this, ...
Read MoreProgram to find out the index in an array where the largest element is situated in Python
Suppose, we are given a class called 'TestArray' that contains an array that is not accessible by other classes and two public member functions length() and compare(). The function length() returns the length of the array and the function compare() returns three different values comparing various subarrays from the array. The function takes four values l, r, x, y as input and works like this −if (array[l] + array[l+1]+......+array[r-1]+array[r]) > (array[x] + array[x+1]+......+array[y1]+array[y]); it returns 1if (array[l] + array[l+1]+......+array[r-1]+array[r]) = (array[x] + array[x+1]+......+array[y1]+array[y]); it returns 0if (array[l] + array[l+1]+......+array[r-1]+array[r]) < (array[x] + array[x+1]+......+array[y1]+array[y]); it returns -1We have to find out ...
Read MoreProgram to find out the number of boxes to be put into the godown in Python
Suppose, we have two arrays containing integers. One list contains the height of some unit width boxes and another array contains the height of rooms in the godown. The rooms are numbered 0...n, and the height of the rooms is provided in their respective indexes in the array godown. We have to find out the number of boxes that can be pushed into the godown. a few things have to be kept in mind, The boxes can’t be put one on another.The order of the boxes can be changed.The boxes are put into the godown from left to right only.If ...
Read MoreProgram to find out the index of the most frequent element in a concealed array in Python
Suppose, we are given a class called 'TestArray' that contains an private array which can only contain values 0 or 1; and two public member functions length() and query(). The function length() returns the length of the array and the function query() returns three different values comparing various values in the array. The function takes four values p, q, r, s as input and works like this −if all the four values in the given indexes of the array are either 0 or 1, it returns 4.else if any three values in the given indexes of the array are the ...
Read MoreProgram to find out the dot product of two sparse vectors in Python
Suppose, we have two sparse vectors represented in two lists. We have to return the dot product of the two sparse vectors. The vectors are represented as objects, and the lists are stored in a member variable 'nums' in the objects.So, if the input is like vector1 = [1, 0, 0, 0, 1], vector2 = [0, 0, 0, 1, 1], then the output will be 1 The dot product is 1 * 0 + 0 * 0 + 0 * 0 + 0 * 1 + 1 * 1 = 1.To solve this, we will follow these steps −res := ...
Read MoreProgram to find largest perimeter triangle using Python
Suppose we have an array nums of positive lengths, we have to find the largest perimeter of a triangle, by taking three values from that array. When it is impossible to form any triangle of non-zero area, then return 0.So, if the input is like [8,3,6,4,2,5], then the output will be 19.To solve this, we will follow these steps −sort the list numsa := delete last element from numsb := delete last element from numsc := delete last element from numswhile b+c
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