Compilare: user.cpp: In function ‘long long int make(long long int)’: user.cpp:52:14: warning: unused variable ‘nx’ [-Wunused-variable] for(auto nx : sol) { ^ user.cpp:73:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:76:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sport2.in","r",stdin); ^ user.cpp:77:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sport2.out","w",stdout); ^