IsraeliQ in cpp
based on the work described here
https://www.cambridge.org/core/journals/probability-in-the-engineering-and-informational-sciences/article/div-classtitlethe-israeli-queue-with-infinite-number-of-groupsdiv/1D1317AB03A9A65492EF16E295100EA9 http://www.math.tau.ac.il/~uriy/Papers/IQ-with-Priorities.pdf https://rapidapi.com/blog/israeli-queues-exploring-a-bizarre-data-structure/