3 ms·
It's in reverse polish notation: let a be the sequence (1, "Enter", 5, "Enter", /) then press $a, $a, +, $a, +.
by rrobukef 4y ago
It's in reverse polish notation: let a be the sequence (1, "Enter", 5, "Enter", /) then press $a, $a, +, $a, +.
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