You follow a set of rules step by step, like a recipe. You're not trying to be clever — you just do exactly what the problem says, one step at a time.
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Greedy
At each step, you pick the best-looking option right now, without worrying about what comes later. Sometimes this works perfectly — but you have to know when!
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Dynamic Programming
Some problems have subproblems that repeat. Instead of solving them over and over, you solve each one once, remember the answer, and reuse it.
How to solve a problem
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Start program
Every solution begins here. Snap your blocks below this green block. It's already on the canvas — don't delete it.
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End program
Every solution ends here. Your chain of blocks must connect all the way down to this red block.
📤
print answer
This is how you submit your answer. Snap a number or variable into it — the grader reads whatever you print.
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Toolbox
The coloured panel inside each problem holds all your blocks: Inputs, Loops, Logic, Math, Variables, and Output. Drag from there onto the canvas.
Try it! Drag a 📤 print answer block from the Output toolbox and snap it between Start and End. Type Hello in the text field. Then press ▶ Run.