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#include <cstring> #include <cstdlib> #include <ctime> #include <cmath> #include <iostream> #include <algorithm> #include <vector> #include <stack> #include <queue> #include <map> #include <set> #include <list> #include <string> #include <sstream> using namespace std;
#define Lson(x) (x<<1) #define Rson(x) (Lson(x)|1) #define Mid(x,y) ((x+y)>>1)
#define _PI acos(-1.0) #define esp 1e-9 #define INF 0x3f3f3f3f
#define MAXN #defube N
int () {
return 0; }
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