The Fear Calculator

Abdul always suffered from anxiety and fear. To understand him better, the ingenious Doctor used a complex method to calculate his fear. The doctor wants to automate the process and hence needs your help! Given an array $A$ of $N$ integers you have to find the index of the first smaller element to the right of every index $i$, let it be $j$, then the $fear[i]$ of the index would be $j + 1 -i$, an