Compilare: user.cpp: In function ‘bool good(long long int)’: user.cpp:15:15: warning: unused variable ‘s’ [-Wunused-variable] long long s = 0, total = 0; ^ user.cpp: In function ‘int main()’: user.cpp:45:9: warning: unused variable ‘a’ [-Wunused-variable] int a, b; ^ user.cpp:45:12: warning: unused variable ‘b’ [-Wunused-variable] int a, b; ^ user.cpp:42:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("transport.in", "r", stdin); ^ user.cpp:43:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("transport.out", "w", stdout); ^