http://begemotv2718.livejournal.com/ ([identity profile] begemotv2718.livejournal.com) wrote in [personal profile] seminarist 2010-10-18 04:58 pm (UTC)

На самом деле много легче: 5*10^2+2*10*(1+2+3+4)+1^2+2^2+3^2+4^2. В уме можно посчитать.
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