Compilare: user.cpp: In function ‘void up(long int, long int)’: user.cpp:24:6: warning: unused variable ‘ps’ [-Wunused-variable] long ps=pos[S[k].gf]; ^ user.cpp: In function ‘void cut(long int&)’: user.cpp:67:9: warning: unused variable ‘con’ [-Wunused-variable] int con; ^ user.cpp: In function ‘int main()’: user.cpp:107:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<V[minp].size();j++) { ^ user.cpp:79:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld%ld%ld",&n,&m,&k); ^ user.cpp:88:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld",&x); ^ user.cpp:93:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld%ld%ld",&x,&y,&z); ^