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Articles by Sunidhi Bansal
Page 42 of 81
Maximum number of dots after throwing a dice N times in C++
Given the task is to calculate the maximum number of dots that can be expected after throwing a dice N times having M faces.The first face of the dice contains 1 dot, the second face has 2 dots and so on. Likewise the M-th face contains M number of dots.The probability of appearance of each face becomes 1/M.Let’s now understand what we have to do using an example −Input − M=2, N=3Output − 1.875Explanation − The dice has 2 sides = {1, 2}If the dice is thrown 3 times then the sample space will be = MN = 23{(1, 1, ...
Read MoreCount unordered pairs (i,j) such that product of a[i] and a[j] is power of two in C++
We are given with an array of N elements. The goal is to find the count of all pairs (Arr[i], Arr[j]) which have a sum which is a perfect square such that i!=j. That is Arr[i]+Arr[j] is a perfect square.We will do this by calculating the sum of pairs and check if the square root of that sum is equal to the floor value of the square root. sqrt(Arr[i]+Arr[j])-floor( sqrt(Arr[i]+Arr[j] )==0.Let’s understand with examples.Input − Arr[]= { 4, 3, 2, 1, 2, 4 } N=6Output − Count of pairs with sum as perfect square − 2Explanation −Arr[1]+Arr[3]=4, sqrt(4)-floor(4)=0 4 is ...
Read MoreCount valid pairs in the array satisfying given conditions in C++
We are given with an array arr[] of N elements. The goal is to find the count of all valid pairs (Arr[i],Arr[j]) that follow certain conditions. Pairs Arr[i],Arr[j] invalid if −Arr[i]==Arr[j]Arr[i]+Arr[j] is eveni+j
Read MoreMaximum number of groups of size 3 containing two type of items in C++
Given the task is to calculate the maximum number of groups of size 3 that can be formed when N number of items of type A and M number of items of type B are given.Also, each group should have at least one item of each type, that is either A or B.Let’s now understand what we have to do using an example −Input − N=3, M=5Input − 2ExplanationGroup 1: 1 item of type A and 2 items of type B Group 2: 1 item of type A and 2 items of type B In total, 2 items of type ...
Read MoreCount ways of choosing a pair with maximum difference in C++
We are given with an array of numbers Arr[]. The goal is to count the number of pairs whose difference is equal to the maximum difference of all possible pairs. Count pairs (i!=j) and arr[x]- arr[y] is maximum possible.We will do this by first finding the maximum difference where (i!=j). And store as maxdiff. Then count all those pairs that have difference=maxdiff.Let’s understand with examples.Input − arr[]= { 1, 2, 3, 2, 4, 1, 5 }Output − No. of ways of choosing pair with maximum difference − 2Explanation −Here minimum no. is 1 and maximum number is 5, maximum difference ...
Read MoreCount the triplets such that A[i] < B[j] < C[k] in C++
We are given with three arrays A[], B[] and C[]. The goal is to find all triplets of elements of these arrays such that A[i]
Read MoreCount total divisors of A or B in a given range in C++
We are given four integers L, R, A and B. The goal is to find the count of numbers in range [L, R] that fully divide either A or B or both.We will do this by traversing from L to R and for each number if number%A==0 or number%B==0 then increment count of divisors.Let’s understand with examples.Input − L=10, R=15, A=4, B=3Output − Count of divisors of A or B − 2Explanation −Number 12 is fully divisible by 3 and 4. Number 15 is fully divisible by 3 only. Total divisors=2Input − L=20, R=30, A=17, B=19Output − Count of divisors ...
Read MoreMaximum number of ones in a N*N matrix with given constraints in C++
Given the task is to find the maximum number of ones in a binary matrix possible with the following constraints.Two integers N and X are given where X
Read MoreCounting cross lines in an array in C++
We are given with an array of distinct elements that are unsorted. The goal is to find the cross lines after the array is sorted. Cross lines are counted as shown below −Arr[]={ 1, 2, 4, 3, 5 } There are 3 cross lines as shown belowArr[]= { 1, 2, 3, 4, 5 }. There are no cross lines as the array is already sorted.We will count the cross lines using insertion sort in which an element from right is added to sorted elements on its left. Each time the element is added in the sorted part, increment count as ...
Read MoreMaximum number of parallelograms that can be made using the given length of line segments in C++
Given the task is to find the maximum number of parallelograms that can be made using given N number of line segments if each line segment can be used at most in one parallelogram.Let’s now understand what we have to do using an example −Input − Arr[] = {8, 3, 1, 3, 8, 7, 1, 3, 5, 3}Output − 2Explanation − With the above given line segments, the two parallelograms that can be formed are with sides 8, 1, 8, 1 and 3, 3, 3, 3 respectively.Input − Arr[] = {7, 9, 9, 7}Output − 1Approach used in the below ...
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