i had a doubt on this https://codeforces.net/contest/1580/problem/C Problem ,i read the editorial but couldn't understand one line My doubt is when x+y> root(m) we can see all the maintenance days ,but what to do when it is less than root(m)? Thanks

P.S. please don't downvote as it results in blog not showing up after a couple of downvotes .if you don't wanna upvote ,it's fine but downvoting it would result in me not getting my doubt solved .