Glass Bridge (Hard)

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**This is the hard version of the problem. The only difference between this version and the hard version are the constraints on $N$ and $M$** Chef is watching the new season of Squid Game, where contestants face a *glass bridge* challenge. The bridge has $M$ steps, and each step consists of two glass panels suspended side by side. **Exactly one** panel on each step is strong enough to support

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solution.cppC++17

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