#include <stdio.h>

int main(int argc, char **argv){
	FILE *fp;
	char filename[255];

	if (argv[1]){
		strcpy (filename, argv[1]);
	}

	if ((fp = fopen (filename, "rb")) == NULL){
		fp = stdin;
	}

	fseek(fp,0x1C,SEEK_SET);
	if (fgetc(fp) != 0x10){
		fprintf(stderr,"Not a 16-bit bmp file.\n");
		exit(1);
	}

	unsigned long imgwidth;
	unsigned long imgheight;

	fseek(fp,0x12,SEEK_SET);
	fread (&imgwidth,4,1,fp);
	fread (&imgheight,4,1,fp);

	printf ("P3\n%d %d\n31\n\n",imgwidth,imgheight);

	//ヘッダ長調べて読み飛ばし
	fseek(fp,0x0A,SEEK_SET);
	int startat=fgetc(fp);
	fseek(fp,startat,SEEK_SET);

	unsigned short filebit;

	unsigned short rval=0;
	unsigned short gval=0;
	unsigned short bval=0;

	int realbitwidth=imgwidth*2;
	int bitwidth = (realbitwidth%4)?((realbitwidth/4+1)*4):(realbitwidth);

	int i=0;

	while (i<imgheight){
		int j=0;
		fseek(fp,(imgheight-i-1)*bitwidth+startat,SEEK_SET);
		while(j<realbitwidth){
			fread(&filebit,2,1,fp);
			j+=2;
			bval = filebit << 11;
			bval = bval >> 11;
			gval = filebit << 6;
			gval = gval >> 11;
			rval = filebit << 1;
			rval = rval >> 11;
			printf ("%d %d %d\n",rval,gval,bval);
		}
		i++;
	}

	fclose (fp);
}