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Tasks involving writing interpreters for various languages or formalisms.

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Interpret PlusOrMinus

C (gcc), 59 bytes char i;f(char*c){i+=*c==43;*c==45&&putchar(i--);f(c+!!*c);} Ungolfed: char i; // the counter /*implicit int here */ f (char* c) { // increment the counter if *c is '+' (43), sin …
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