Compilare: main.cpp: In function 'void BFS()': main.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<v[u].size();t++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:72:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vm.size();i++) ~^~~~~~~~~~ main.cpp:78:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<v[a].size();t++) ~^~~~~~~~~~~~ main.cpp:86:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<v[b].size();t++) ~^~~~~~~~~~~~ main.cpp:101:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vm.size();i++) ~^~~~~~~~~~ main.cpp:56:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&m); ^ main.cpp:59:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&x,&y,&c); ^