Compilare: user.cpp: In function ‘int main()’: user.cpp:91:15: warning: unused variable ‘sol’ [-Wunused-variable] long long sol; ^ user.cpp:92:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&n,&k,&t); ^ user.cpp:94:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&v[i].second,&v[i].first); ^