Compilare: main.cpp: In function 'int main()': main.cpp:75:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; ++i){ ~~^~~~~~~~~~~~~~~ main.cpp:23:30: 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:25:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&x,&y,&z); ^ main.cpp:31:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&q); ^ main.cpp:33:53: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&w[i].first,&w[i].second); ^ main.cpp:18:15: warning: 'ndr' may be used uninitialized in this function [-Wmaybe-uninitialized] int nst , ndr , changed , ii; ^~~ main.cpp:189:24: warning: 'nst' may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = 1 ; i <= st ; ++i) ~~^~~~~