What is the Travelling salesman problem?
Given a list of n cities and distances between those cities, find the shortest cycle which visits each city exactly once before returning to the city where it started.
What is the Knapsack problem?
Given n items of known weights w1, w2… wn and values v1, v2, . . . vn and a knapsack of capacity W, find the most valuable subset of the items that fit into the knapsack.
What is the Maximum independent set problem?
Find the largest subset of elements from a superset,
so that there is no edge that connects two vertexes in the subset