#include <stdio.h>
#include <math.h>
main(int argc, char *argv[]) {
	
	float latWanted, lonWanted;
	
	FILE *fp;
	
	if (argc != 4) {
		printf("%s: lat lon dir\n", *argv);
		return 1;
	}
	
	sscanf(*++argv, "%f", &latWanted); --argc;
	sscanf(*++argv, "%f", &lonWanted); --argc;
	
	//printf ("(latWanted, lonWanted) = (%f, %f)\n", latWanted, lonWanted);
	
	
	while (--argc > 0) {
		
		//printf ("%d files left to process...\n", argc);
		
		fp = fopen(*++argv, "rd");
		//printf("reading from %s\n", *argv);
		
		if (fp == NULL) {
			printf("distanceToTrack: can't open %s\n", *argv);
			return 1;
		} else {
			char buf[1024];
			float time, lat, lon, l2, gt, gs, pt, gf, tt, tc, mt, ma, mm, carter;
			int flag;
			float distanceSqr, minDist;
			float myTime = -1, myLat = -1, myLon = -1;
			
			fgets(buf, 1024, fp); //printf("line #1: %s", buf);
			fgets(buf, 1024, fp); //printf("line #2: %s", buf);
			minDist = 1000*1000*1000.;
			
			while (fgets(buf, 1024, fp) != NULL) {
				//printf("%s", buf);
				
				sscanf(buf, "%f %f %f", &time, &lat, &lon);
				distanceSqr = (latWanted - lat) * (latWanted - lat);
				distanceSqr+= (lonWanted - lon) * (lonWanted - lon);
				
//printf("%f \t%s:\t(time, lat, lon) = (%10.0f, %10.4f, %10.4f)\n", (distanceSqr), *argv, time, lat, lon);
				if (distanceSqr < minDist) {
					myTime= time;
					myLat = lat;
					myLon = lon;
					minDist = distanceSqr;
//					printf("**%f \t%s:\t(time, lat, lon) = (%10.0f, %10.4f, %10.4f)\n", sqrt(minDist), *argv, time, lat, lon);
//					printf("**%f \t%s:\t(time, lat, lon) = (%10.0f, %10.4f, %10.4f)\n", (minDist), *argv, time, lat, lon);
				}
			}
			printf("%f \t%s:\t(time, lat, lon) = (%10.0f, %10.4f, %10.4f)\n", sqrt(minDist), *argv, myTime, myLat, myLon);
		}
	}
}