On special occasions, the gods meet at the university restaurant for a joyful feast. Anthena always invites Nathena to such feasts, but Nathena often refuses to join arrogantly.
As his presence at the university restaurant is so extremely rare, legends tell that, since Nathena emerged from Zeos' head, he has only recharged his university restaurant credit balance once. It is known that one can buy at most 200 drachmas (yes, the gods still use this currency) worth of credit at once. It's also known that each meal at the university restaurant costs exactly two drachmas.
Knowing how many drachmas worth of credit Nathena bought on his recharge and his current credit balance, discover how many times he has feasted at the university restaurant.
The input consists of a single line with two integers $$$x$$$ and $$$y$$$ separated by a space, the value in drachmas of Nathena's refill and his current balance, respectively. It's guaranteed that $$$0 \leq y \leq x \leq 200$$$ and that both $$$x$$$ and $$$y$$$ are of the same parity.
The output should contain a single integer, representing the number of times Nathena feasted at the university restaurant.
50 34
8
131 47
42
| VIII MaratonUSP Freshman Contest |
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| Finished |
