#include <stdio.h>
#include <stdlib.h>
 
int main(void) {
	// scan data
	 int data[50][50]={0};
	 int n,m;
	 scanf("%d%d",&n,&m);
	 int i,j;
	 for(i=0;i<n;i++)
		for(j=0;j<m;j++)
			scanf("%d",&data[i][j]);
 
	//process data
	int x;
	int a,b;
	int count=0;
	int total;
	int print[2500][2];
	int dist;
	for(i=0;i<n;i++)
		for(j=0;j<m;j++){
			x=data[i][j];
			total=0;
 
			for(a=0;a<n;a++)
				for(b=0;b<m;b++){
					dist=abs(i-a)+abs(j-b);
					if(dist<=x) total+=data[a][b];
				}
 
			if(total%10==x%10){
				print[count][0]=i;
				print[count][1]=j;
				count++;
			}
 
		}
 
	printf("%d\n",count);
	for(i=0;i<count;i++)
		printf("%d %d\n",print[i][0],print[i][1]);
	return 0;
}
 

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

NSA2IAoxIDMgNCAxIDMgMQoxIDEgNCAxIDMgMQoxIDEgMyAyIDUgMwo0IDMgMyAxIDQgMQo1IDIgMSAxIDEgMQ==

5 6 
1 3 4 1 3 1
1 1 4 1 3 1
1 1 3 2 5 3
4 3 3 1 4 1
5 2 1 1 1 1