#include <stdio.h>
#include <stdlib.h>
//Histogram equalization of pgm images: Stage 1
int main (  )
{
	
	char c;
	char imageType[3];
	int width, height, maxIntensity;
	int frequency[256];
	int i,j;
	int gray = 0;
	
	//read magic number
	scanf ( "%s", imageType);
	
	//Stop if image type is not P5
	if (strcmp(imageType,"P5") != 0) {
		printf("Bad image format. Check image format and run again\n");
		exit(1);
	}
		
	//Read and discard characters till you see a newline
	do {
			c = fgetc(stdin);
		} while ( c != '\n');

	
	c = fgetc(stdin); //Read next character. This may be the # character
	
	if ( c == '#') { //file has a comment
		//Read and discard characters till you see a newline
		do {
			c = fgetc(stdin);
			} while ( c != '\n');
		}
	else {// file has no comment
		ungetc(c, stdin);
		}
	
	scanf("%d %d", &width, &height);
	scanf("%d", &maxIntensity);
	
	
	
	//Read and discard characters till you see a newline
		do {
			c = fgetc(stdin);
			} while ( c != '\n');

	//end of header processing

	//initialize the frequency array
	for(i=0; i < 256; i++) {
		frequency[i] = 0;
	}
		

	//read grayscale image data and compute the histogram
	for ( i=0; i < width*height; i++ )
	{
		scanf ( "%c", &gray);
		pixelIntensities[i] = gray; //save the pixel intensities in the array
		frequency[gray]++;
	}
	
	//Part 2: Print the histogram using *
	
	
}