Compilare: user.cpp: In function ‘int main()’: user.cpp:57:19: warning: unused variable ‘t’ [-Wunused-variable] long long int t[pos]; ^ user.cpp:58:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&m); ^ user.cpp:61:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld %lld",&a,&b); ^