Compilare: user.cpp: In function ‘int main()’: user.cpp:45:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^ user.cpp:87:19: warning: ‘js’ may be used uninitialized in this function [-Wmaybe-uninitialized] l[1].second=js; ^ user.cpp:86:18: warning: ‘is’ may be used uninitialized in this function [-Wmaybe-uninitialized] l[1].first=is; ^