#include <stdio.h>

#define AA 197
#define AE 196
#define OO 214
#define aa 229
#define ae 228
#define oo 246

typedef unsigned char byte;

int main(int argc, char *argv[])
{
	if (argc < 2)
	{
		printf("Usage: is_iso {fileName}\n");
		return -1;
	}

	FILE *file = fopen(argv[1], "rb");

	while (!feof(file))
	{
		byte b = fgetc(file);

		if (b == AA || b == AE || b == OO || 
			b == aa || b == ae || b == oo)
		{
			return 0;
		}
	}

	return 1;
}