Compilare: main.cpp: In function 'int main()': main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[tp.x].size();i++) ~^~~~~~~~~~~~~~~ main.cpp:63:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[j].size();i++) ~^~~~~~~~~~~~ main.cpp:28:28: 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:32:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d",&j,&k,&o); ^