Compilare: main.cpp: In function 'int bfs()': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i=0 ; i<v[nod].size() ; i++ ){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;start[nod] < v[nod].size() ; start[nod]++){ ~~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:89:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:91:34: 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:100:57: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x[i].first,&x[i].second); ^