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#include <stdio.h>
 
#define MAX_SIZE 110
 
int N, M;
int Miro[MAX_SIZE][MAX_SIZE];
 
int move_i[] = { -1, 0, 1, 0};
int move_j[] = { 0, 1, 0, -1};
 
struct queue{
	int n, m, count;
};
 
struct queue Q[MAX_SIZE*MAX_SIZE];
 
void func()
{
	int front = 0, rear = 0;
 
	if(Miro[0][0] == 1)
	{
		Q[rear].n = 0;
		Q[rear].m = 0;
		Q[rear].count = 1;
		rear++;
	}
 
	while(front != rear)
	{
		for(int i=0; i<4; i++)
		{
			n = Q[front].n + move_i[i];
			m = Q[front].m + move_j[i];
 
			if(n < 0 || m < 0 || n >= N || m >= M) continue;
			if(checker[n][m] == false) continue;
			if(miro[n][m] == 1)
			{
				Q[rear].n = n;
				Q[rear].m = m;
				Q[rear].count = Q[front].count + 1;
				rear++;
			}
		}
 
		front++;
	}
}
 
int main(void) {
	// your code goes here
	scanf("%d", &N, &M);
 
	for(int i=0; i<N; i++)
	{
		for(int j=0; j<M; j++)
		{
			scanf("%d", &Miro[i][j]);
		}
	}
 
	func();
 
	printf("%d", Q[front].count);
 
	return 0;
}

prog.c: In function ‘func’:
prog.c:33:4: error: ‘n’ undeclared (first use in this function)
    n = Q[front].n + move_i[i];
    ^
prog.c:33:4: note: each undeclared identifier is reported only once for each function it appears in
prog.c:34:4: error: ‘m’ undeclared (first use in this function)
    m = Q[front].m + move_j[i];
    ^
prog.c:37:7: error: ‘checker’ undeclared (first use in this function)
    if(checker[n][m] == false) continue;
       ^~~~~~~
prog.c:37:24: error: ‘false’ undeclared (first use in this function)
    if(checker[n][m] == false) continue;
                        ^~~~~
prog.c:38:7: error: ‘miro’ undeclared (first use in this function)
    if(miro[n][m] == 1)
       ^~~~
prog.c: In function ‘main’:
prog.c:53:8: warning: too many arguments for format [-Wformat-extra-args]
  scanf("%d", &N, &M);
        ^~~~
prog.c:65:17: error: ‘front’ undeclared (first use in this function)
  printf("%d", Q[front].count);
                 ^~~~~

Standard output is empty