Compilare: main.cpp: In function 'bool bfs(int)': main.cpp:38:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int j=1; j<=n; j++) ~^~~ main.cpp: In function 'void read()': main.cpp:62:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&teste); ^ main.cpp:66:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ main.cpp:72:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^