https://mirror.codeforces.com/contest/4/submission/174376175
My code:Check if sumtime is in $$$[minsum,maxsum]$$$,minsum is the sum of all the $$$mintime$$$ and maxsum is the sum of all the $$$maxtime$$$.Then greedy for the solution.
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Not sure if greedy is applicable here, though I solved it with knapsack-like dp. Could you elaborate on your solution?
you are so close my guy. I took your code and only changed one thing. This is my submission: https://mirror.codeforces.com/contest/4/submission/178599913
can you spot what i noticed?
your first if condition in the while loop
`
when you update sumtime
you set sumtime to suntime — (maxtime[j] + mintime[j]) — why do you do this? The correct thing to do is to set sumtime to sumtime — (maxtime[j] — mintime[j]) — this is because at the start you have already taken away mintime[j] from sumtime, therefore, using maxtime[j] hours on the jth day means that you only have to takeaway (maxtime[j]-mintime[j]) more hours from sumtime.
hope this helps