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#include "math.h"
#include <stdint.h>
static uint64_t seed;
void srand(unsigned int s) {
seed = s-1;
}
int rand() {
seed = 6364136223846793005ULL*seed + 1;
return seed>>33;
}
double fabs(double x) {
union {double f; uint64_t i;} u = {x};
u.i &= -1ULL/2;
return u.f;
}
double sin(double x);
double cos(double x);
double tan(double x);
double asin(double x);
double acos(double x);
double floor(double x);
double ceil(double x);
double fmod(double x, double y);
double sqrt(double x);
double log(double x);
double exp(double x);
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