#include <stdio.h>
#include <stdlib.h>
#include <math.h>


main(int argc, char **argv)
{
    double start, end;
    int n;
    int i;
    if (argc < 4) {
	printf("Invalid input\n");
	return 1;
    }
    start = atof(argv[1]);
    end = atof(argv[2]);
    n = atoi(argv[3]);
    printf("%f %f %d %f\n", start, end, n, sin(start));

    /* for (i = 0; i < argc; i++){ */
    /* 	printf("%04d: %s\n", i, argv[i]); */
    /* } */
}