Compilare: main.cpp: In function 'void DFS(int)': main.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[n].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:63:28: 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:66:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&ar); ^ main.cpp:95:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&x,&y); ^ main.cpp: In function 'int log(int)': main.cpp:18:19: warning: 'mij' may be used uninitialized in this function [-Wmaybe-uninitialized] int st=0,dr=i,mij; ^~~ main.cpp: In function 'int main()': main.cpp:18:19: warning: 'mij' may be used uninitialized in this function [-Wmaybe-uninitialized]