Suppose there are n cities and that are connected with n -1 roads. A city can be visited from any other city. Now the postal system of the cities delivers k letters daily. The letter's destination can be any of the k different cities. A postal worker has to deliver ... Read More

Suppose we have a special type of graph that has two types of vertices that are named head and feet. The graph has only one head and there are k edges that connect the head to each of the feet. So, if we are given an undirected, unweighted graph; we ... Read More

Suppose we are given an undirected, weighted graph and are asked to find out the path with the minimum possible travel cost from a particular node to another particular node. The travel cost is calculated as the following: suppose there is a path between vertex A to vertex C as ... Read More

Suppose we have an array called nums, we have to find the number of good ways to split this array nums. Answer may be too large so return result modulo 10^9 + 7. Here a split of an array (with integer elements) is good if the array is split into ... Read More

Suppose we are given an undirected, weighted graph and are asked to find out the path with the minimum possible penalty from node a to node b. The penalty of a path is the bitwise OR of the weights of all the edges in the path. So, we must find ... Read More

Suppose we are given a graph and are asked to find out the minimum size of the largest clique in the graph. A clique of a graph is a subset of a graph where every pair of vertices are adjacent, i.e. there exists an edge between every pair of vertices. ... Read More

Suppose we are given a graph and asked to find out the 'Minimum Spanning Tree' (MST) from that graph. An MST of a graph is a subset of a weighted graph where all the vertices are present and connected, and there exists no cycle in the subset. MST is called ... Read More

Suppose we are playing a game of snakes and ladders. We have a condition that we can roll any number that we can like on a dice. We start from position 0 and our destination is position 100, and we roll the dice several times to reach the destination. We ... Read More

Suppose we have an array deli where deli[i] is the deliciousness of the ith food, we have to find the number of different good meals we can make from this list. If the answer is too large, then return result modulo 10^9 + 7. Here a good meal means a ... Read More

Suppose we have two arrays called days and apples of same length n. There is a special kind of apple tree that grows apples every day for n consecutive days. On the ith day, it grows apples[i] number of apples and that will rot after days[i] days, so we can ... Read More