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Blue marshmallows

Problem Description Pinkman and Heisenberg love marshmallows. They like to play a little game with crystal blue marshmallows. When Pinkman eats 1 marshmallow, then Heisenberg has to eat 2, then Pinkman eats 3 marshmallows, then Heisenberg eats 4 marshmallows and so on. Once one of them cant eat the supposed number of marshmallows he should, he loses. Pinkman can eat at most X marshmallows in to

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L1 Observation
L2 Technique
L3 Approach
L4 Pseudo-code
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L5 Full solution
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solution.cppC++17

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