CF_Pipelines(binary search)

NaN.

this problem tells to implement binary search..........i know binary search but i can not find any way how will i implement binary search in this problem to get the desired solution.

https://l.facebook.com/l.php?u=http%3A%2F%2Fcodeforces.com%2Fproblemset%2Fproblem%2F287%2FB&h=ATONQjszFS4mhhJHCm8mjI0JbEkfkFa8IGCu8blA-6uLOWyQ-rz-JsqPJiptW3CMvNlnxkM_mx1gsZqR9Xw5VuQCRvkz3-Yf6inQZyZIBGDKgGqjusoSQYTb0EQiDKOLFtxkEkSrlEpb7Belae_AIqAlweywb4rWf0hSdrKlu_4AtCiWaO7D376-ZOHA25gMiLzh2bAD4CzRFOwiN2z7dTvFiBmykBqz_BYUfa_BIGCa15VkeQYbP0kPHukkxuXz8ltK4qZ9TocAvLv1xE8

Codeforces

http://codeforces.com/problemset/problem/287/B

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