Compilare: user.cpp: In function ‘int make(int)’: user.cpp:50:14: warning: unused variable ‘nx’ [-Wunused-variable] for(auto nx : sol){ ^ user.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:73:35: 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:74:37: 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); ^