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解法～～～.～

Posted by ecbtnrt at 2007-10-05 17:33:32 on Problem 3233 
令f(1)=A%m;
  f(2)=A + A^2 = A(A+I)=A*(f(1)+I)%m;
  f(3)=A + A^2 + A^3 = A( (A+A^2)+I) = A*(f(2)+I)%m;

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  f(n)=A*(f(n-1)+I)%m;
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