Compilare: user.cpp: In function ‘void solve()’: user.cpp:132:15: warning: unused variable ‘rest’ [-Wunused-variable] int diff, rest; ^ user.cpp: In function ‘void readFile()’: user.cpp:19:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &n, &b, &c); ^ user.cpp:24:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &d[i]); ^