Compilare: main.cpp: In function 'int bfs()': main.cpp:25:22: 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:43:22: 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:62:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:66:70: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&p[i].x , &p[i].y , &p[i].z , &p[i].t); ^