Compilare: main.cpp: In function 'void dfs(int)': main.cpp:74:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void doo()': main.cpp:80:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;++i) ^~~ main.cpp:85:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fprintf(fout,"%d\n",s); ^~~~~~~ main.cpp: In function 'void myRead()': main.cpp:63:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ main.cpp:66:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^