#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>

main(argc, argv)
	int	argc;
	char	**argv;
{
	struct stat st;
	extern char *sys_errlist[];
	extern int errno;
	int	i;
	
	if (argc < 2) {
		printf("-2\n");
		printf("Usage: %s filename ...\n", argv[0]);
		exit(1);
	}
	i = 1;
	while (argv[i]) {
		if (stat(argv[i],&st) < 0) {
			printf("-1\n%s: %s\n", argv[i], sys_errlist[errno]);
			exit(1);
		}
		printf("%d\n", st.st_mtime);
		i++;
	}
	exit(0);
}