Chef and Notebooks

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Chef likes to write poetry. Today, he has decided to write a X pages long poetry, but unfortunately his notebook has only Y pages left in it. Thus he decided to buy a new CHEFMATE notebook and went to the stationary shop. Shopkeeper showed him some N notebooks, where the number of pages and price of the ith one are Pi pages and Ci rubles respectively. Chef has spent some money preparing for Ksen's

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solution.cppC++17

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