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| #include <bits/stdc++.h> | |
| #define fori(i, st, en) for(int i = st; i < (int) (en); i++) | |
| #define rfori(i, st, en) for(int i = st; i >= (int) (en); i--) | |
| #define f first | |
| #define s second | |
| #define pb push_back | |
| #define left(i) (i<<1) | |
| #define right(i) (i<<1|1) | |
| #define mid(l, r) ((l+r)>>1) | |
| using namespace std; |