In the problem tag it is mentioned that it can be solved using binary search.How to solve it using binary search ? https://codeforces.com/contest/1283/problem/D
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In the problem tag it is mentioned that it can be solved using binary search.How to solve it using binary search ? https://codeforces.com/contest/1283/problem/D
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Please don't down vote .Don't make me sad during new year time .... If you give answer you are santa for me.
See: https://codeforces.com/blog/entry/72592
It shows a simpler(?) solution than binary search
Edit: Not sure how you would use binary search
Also, don't use unordered_map or unordered_set because you will get TLE on test 6. Use map or set instead.