Vic's nonogram

#include <stdio.h>
#include <stdlib.h>
#include "nonogram.h"
#include <string.h>
#include <assert.h>

int main(void) {

	int width, height;

	scanf("%d%d", &width, &height);

	//Prevents incorrect initial inputs
	if (!(width > 0 && height > 0)) {
		printf("Cannot decode\n");
		return 0;
	}

		char row[50];
		char grid[height][width];

		int limit=0;
		while(scanf("%s",row)!=EOF){

			if(strlen(row)!=width){
				printf("Invalid image data\n");
				return 0;
			}

			else if(limit >height-1){
				printf("Invalid image data\n");
				return 0;
			}

			else if(limit == height-1){
				break;
			}

			else {
				strcpy(grid[limit],row);
				limit++;
			}
		}

		if(limit != height-1){
			printf("Invalid image data\n");
			return 0;
		}

		for(int i=0;i<width;i++) {
		  grid[height-1][i]=row[i];
		}


		//Time to print X
		int onecount = 0; //Keeping track of how many ones have been printed
		int prevprint = 0; //Has something been printed before? Deals with whitespace issues
		int prevdetect = 0; //Has a one been seen before?

		printf("X:\n");

		for (int i = 0; i<height; i++) {
			for (int j = width-1; j >= 0; j--) {
				if (grid[i][j]== '0') {

					if (j == width) { //beginning OR 1 not encountered yet
						continue;
					}
					if (prevdetect == 0) { //1 NOT encountered
						continue;
					}
					if (prevdetect == 1) { //1 detected previously

						if (prevprint == 0) { //Nothing printed before
							printf("%d", onecount); //Note the lack of whitespace
							prevprint = 1; //Ensures whitespace between printouts if necessary
						}
						else {
							printf(" %d", onecount);
						}

						prevdetect = 0; //Resets
						onecount = 0;

					}


				}

				else { //When encountering a one
						if (j == 0) { //end of line
							onecount++;
							if (prevprint == 0) {
							 printf("%d", onecount);
							}

							else {
								printf(" %d", onecount);
							}

						}

						else {
							onecount++;
							prevdetect = 1;

						}


				}
			}

			if (prevprint == 0 && onecount ==0) {
				printf("0");
			}

			onecount = 0;
			prevdetect = 0;
			prevprint = 0;
			printf("\n");

		}

	//Works fine up to here.
			printf("\nY:\n");
		for (int i=0; i<width; i++) {
			for (int j= height - 1; j>=0; j--) {
				if (grid[j][i] == '0') {
					if (j == height - 1) { //beginning OR 1 not encountered yet
						continue;
					}

					if (prevdetect == 0) { //1 NOT encountered
						continue;
					}

					if (prevdetect == 1) { //1 detected previously

						if (prevprint == 0) { //Nothing printed before
							printf("%d", onecount);
							prevprint = 1;
						}

						else {
							printf(" %d", onecount);
						}

						prevdetect = 0; //Resets one detection
						onecount = 0; //Resets one count

					}

				}
				else { //When encountering a one
						if (j == 0) { //end of line
							onecount++;
							if (prevprint == 0) {
							 printf("%d", onecount);
							}

							else {
								printf(" %d", onecount);
							}

						}

						else {
							onecount++;
							prevdetect = 1;

						}
				}
			}
			if (prevprint == 0 && onecount ==0) {
				printf("0");
			}

			onecount = 0;
			prevdetect = 0;
			prevprint = 0;
			printf("\n");
		}


	return 0;
}