Lohit and Combinatorics

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Problem description. Lohit has come to Quark and joined the Event Numb3rs. He is solving a problem, where he is provided with three integers N,K and R. He is supposed to calculate (N,R) + (N,R+1) + (N+1,R) + (N+2,R) + ..... + (N+K,R). After calculating, if the answer is (A,B), he has to give minimum value of A-B. Can you solve this problem for him? (N,R) denotes number of ways to choose R di

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solution.cppC++17

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