Min money neede

#1

i dont know how to handle for negative integers pls tell me what is wrong in code
link to code is https://ide.codingblocks.com/s/121572

#2

there is no need to handle negative integer because constraints are
1 <= N,W,val[ ] <= 10^3

#3

sir then pls optimise my code how to handle themm pls comment out the changes