Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:47:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz == di[val].size()) /// gata ~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:111:30: 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:113:57: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&mch[i].first,&mch[i].second); ^