April Fools Day Contest |
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Finished |
How to make a cake you'll never eat.
Ingredients.
Method.
Serves 1.
The only line of input contains a sequence of integers a0, a1, ... (1 ≤ a0 ≤ 100, 0 ≤ ai ≤ 1000 for i ≥ 1).
Output a single integer.
4 1 2 3 4
30
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