#include <stdio.h>
#define HALF_ECLIPSE_TO_LINE_RATIO (1.f / 6.f)
#define LINE_TIME_SEC (1.f / 320.f)
#define US_IN_SEC (1e6f)
#define HALF_ECLIPSE_TIME_US (HALF_ECLIPSE_TO_LINE_RATIO * LINE_TIME_SEC * US_IN_SEC)
int main(void) {
// your code goes here
printf("%f", HALF_ECLIPSE_TIME_US
); return 0;
}
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