[AC code link](https://codeforces.me/contest/2063/submission/302470909)↵
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[TLE code link](https://codeforces.me/contest/2063/submission/302432784)↵
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I only add std::move() manually to the TLE code, and it got AC.↵
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But why ????? Shouldn't the Compiler add std::move() automatically ??????↵
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![diff](/predownloaded/35/21/35210e33ef87d87f7358fe08b733d382e3fefd6e.png)
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[TLE code link](https://codeforces.me/contest/2063/submission/302432784)↵
↵
I only add std::move() manually to the TLE code, and it got AC.↵
↵
But why ????? Shouldn't the Compiler add std::move() automatically ??????↵
↵
![diff](/predownloaded/35/21/35210e33ef87d87f7358fe08b733d382e3fefd6e.png)