public static int[] Solve(int[] heights, int[] front)
{
int n = heights.Length;
SegmentTree tree = new SegmentTree();
int[] result = new int[n];
for (int i = 0; i < n; i++)
{
tree.ChangeCount(heights[i], 1);
}
for (int i = n - 1; i >= 0; i--)
{
result[i] = tree.GetValue(i - front[i] + 1);
tree.ChangeCount(result[i], -1);
}
return(result);
}