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September 30, 2026Practice

Function mode and editorials

Practice problems now offer Function mode, where you write one function and the site handles input and output. Full program is still there.

AlgoArena product surface representing Function mode and editorials. — September 30, 2026: Function mode and editorials.

What changed

Practice problems now offer Function mode, where you write one function and the site handles input and output. Full program is still there.
After you solve a problem, you can read its editorial, which walks through the approach.

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