Given 4 integers a,b,c and k . Find the min(non-negative Integral) value of x such that ax2+bx+c >= k.
The first line contains a single integer T i.e. the number of test cases. The first and the only line in each test case consists of four integers a,b,c and k.
Print the min value of the x so that the answer from the equation is atleast equal to k.
1<= a,b,c <=105
4 6 5 5
1 2 3 4
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