Compilare: user.c: In function ‘bfs’: user.c:15:25: warning: ‘return’ with a value, in function returning void [enabled by default] if(dist[li][ci] < k) return 0; ^ user.c: In function ‘main’: user.c:70:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d ", &n, &m); ^