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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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main(int argc, char **argv)
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{
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	char *f, *s;
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	int n;
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	if(argc != 2){
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		fprintf(stderr, "Usage: dirname string\n");
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		exit(1);
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	}
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	s = argv[1];
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	f = s + strlen(s) - 1;
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	while(f > s && *f == '/')
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		f--;
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	*++f = 0;
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	/* now f is after last char of string, trailing slashes removed */
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	for(; f >= s; f--)
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		if(*f == '/'){
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			f++;
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			break;
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		}
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	if(f < s) {
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		*s = '.';
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		s[1] = 0;
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	} else {
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		--f;
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		while(f > s && *f == '/')
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			f--;
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		f[1] = 0;
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	}
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	printf("%s\n", s);
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	return 0;
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}