Given three integers N, X and Y. The task is to find N positive integers that satisfy the given equations.
- a12 + a22 + …. + an2 ≥ X
- a1 + a2 + …. + an ≤ Y
If no such sequence of integers is possible then print -1.
Input: N = 3, X = 254, Y = 18
Output: 1 1 16
12 + 12 + 162 = 1 + 1 + 256 = 258 which is ≥ X
1 + 1 + 16 = 18 which is ≤ Y
Input: N = 2, X = 3, Y = 2
No such sequence exists.
Approach: It is easy to see that in order to maximize the sum of squares, one should make all numbers except the first one equal to 1 and maximize the first number. Keeping this in mind we only need to check whether the given value of y is large enough to satisfy a restriction that all n numbers are positive. If y is not too small, then all we need is to ensure that X ≤ 1 + 1 + … + (y – (n – 1))2.
Below is the implementation of the above approach:
1 1 16
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