int[] a=  {4,1,2,3,4,5,6,7,8,9,10,11,12}

int cols = a[0];
int rows = (a.length - 1)/cols;

int [][]q = {{3,2}, {2,1}};
int out = new int[q.length];
for(int i : q.length)
out[i] = q[rows-1][cols-1]

return out;