Compilare: main.cpp: In function 'int32_t main()': main.cpp:28:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] #define __ freopen("desc.in","r",stdin);freopen("desc.out","w",stdout); ^ main.cpp:137:1: note: in expansion of macro '__' __ ^~ main.cpp:28:71: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] #define __ freopen("desc.in","r",stdin);freopen("desc.out","w",stdout); ^ main.cpp:137:1: note: in expansion of macro '__' __ ^~