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#define min(a, b) ((a)<(b)?(a):(b))
#define max(a, b) ((a)>(b)?(a):(b))
#define ceil_divide(a, b) ((a)/(b)+((a)%(b)!=0))
#define select(cond, a, b) ((cond)?(a):(b))
#define PI 3.141592
#define EPSILON 1e-8
#define MAX_VAL 1e12
#define MIN_VAL -1e12
#define EMPTY_VALUE -1
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