25-challenge

Challenge 25

We have already distributed all the gifts! Back at the workshop, preparations for next year are already beginning.

A genius elf is creating a magical programming language that will help streamline the delivery of gifts to children in 2025.

Programs always start with the value 0, and the language is a string where each character represents an instruction:

• > Moves to the next instruction.
• + Increments the current value by 1.
• - Decrements the current value by 1.
• [ and ]: Loop. If the current value is 0, jump to the instruction after ]. If it is not 0, go back to the instruction after [.
• { and }: Conditional. If the current value is 0, jump to the instruction after }. If it is not 0, continue to the instruction after {.

You need to return the value of the program after executing all the instructions.

Note

A conditional can have a loop inside, and a loop can also have a conditional inside. But two loops or two conditionals are never nested.

execute('+++') // Expected result: 3
execute('+--') // Expected result: -1
execute('>+++[-]') // Expected result: 0
execute('>>>+{++}') // Expected result: 3
execute('+{[-]+}+') // Expected result: 2
execute('{+}{+}{+}') // Expected result: 0
execute('------[+]++') // Expected result: 2
execute('-[++{-}]+{++++}') // Expected result: 5

Solutions

• Python
• JavaScript
• TypeScript

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