I input test data: 100 200 3 3
Is the example  right?

100 = 3^ 4 + 2 * (3^2) + 1

109 = 3^4 + 3^3 + 3^0

117 = 3^4 + 3^2 + 3^1

141 = 3 ^4 + 2* (3^3) + 2 * 3



which model is  right ? or all right ?

Edited by author 07.08.2008 08:27

The models of 100 and 141 are wrong.
The other two ones are right.

the sum of exactly three integer degrees of number 3,

why are  models of 100 and 141  wrong?


who can tell me why ?

Edited by author 09.08.2008 22:57

Edited by author 09.08.2008 22:57

because the problem told us to do so

100 = 3^4 + 2 * (3^2) + 1
141 = 3^4 + 2 * (3^3) + 2 * 3
This ones are incorrect because
when you miltiply one of the degree by 2 It becomes
100 = 3^4 + 3^2 + 3^2 + 1
141 = 3^4 + 3^3 + 3^3 + 3 + 3
so, it's sums of 4 and 5 degees, not 3. Besides, it are to be different.

Edited by author 26.08.2008 13:13

thanks a  lot,  the qustions perplex me a long time, thank you