Finding Shoes

CodeChefRating 646Open on judge ↗

Chef has $N$ friends. Chef promised that he would gift a pair of shoes (consisting of one left shoe and one right shoe) to each of his $N$ friends. Chef was about to go to the marketplace to buy shoes, but he suddenly remembers that he already had $M$ left shoes. What is the minimum number of extra shoes that Chef will have to buy to ensure that he is able to gift a pair of shoes to each of his $

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solution.cppC++17

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