Ответ: 31
s = 3 + 2*2 + 2*3 + 2*4 + 2*5 = 3 + 4 + 6 + 8 + 10 = 31
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Ответ: 31
s = 3 + 2*2 + 2*3 + 2*4 + 2*5 = 3 + 4 + 6 + 8 + 10 = 31