POP // Stack Puzzle

HOW TO PLAY

Implement the solve function using stack instructions to transform the INPUT into the EXPECTED output.

The input values are already on the stack. Write instructions to produce the expected result.

42	Push a number onto the stack
"hi"	Push a string onto the stack
dup	Duplicate the top value
drop	Remove the top value
swap	Swap the top two values
rot	Rotate the top three values (a b c -- b c a)
over	Copy the second value to the top (a b -- a b a)
add	Pop two, push their sum
sub	Pop two, push a - b
mul	Pop two, push their product
div	Pop two, push a / b
mod	Pop two, push a % b
neg	Negate the top value
eq neq gt lt	Comparison (push 1 or 0)
and or not	Bitwise/logical ops

Use fewer instructions for more stars.

Press Ctrl+Enter to run.

You have some numbers in the 📥 INPUT box.

Your job is to use the buttons to make the 📤 OUTPUT match the 🎯 EXPECTED answer!

🔢 Numbers	Type a number and push it onto the pile
📋 COPY	Make a copy of the top number
🗑️ REMOVE	Throw away the top number
🔄 SWAP	Flip the top two numbers around
🔃 ROTATE	Move the bottom one of three to the top
👀 PEEK	Copy the second number to the top
➕ ADD	Add the top two numbers together
➖ SUBTRACT	Subtract the top number from the one below
✖️ MULTIPLY	Multiply the top two numbers
➗ DIVIDE	Split the second number by the top one
🔁 FLIP SIGN	Make positive negative or negative positive

Use fewer steps to earn more stars! ⭐⭐⭐

Tap on a step in your program to remove it.

Press the ▶ play button to run your solution!