Compilare: user.cpp: In function ‘void solve()’: user.cpp:139:21: warning: unused variable ‘rest’ [-Wunused-variable] long long diff, rest; ^ user.cpp: In function ‘void readFile()’: user.cpp:24:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%lld", &n, &b, &c); ^ user.cpp:29:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &d[i]); ^