Draicy & Momos

Draicy enjoys momos and there are $N$ momo stalls at the Momo Carnival. He eats momos in an unusual way, only leaving $X$ momos at each stall. In theory, if a stall has $K$ momos, he will consume $K-X$ momos and leave $X$ momos behind. He must satiate his appetite $H$ at this carnival, which means he must eat **at least** $H$ momos. He's also thoughtful of his fellow momo lovers, so he tries to le