Compilare: user.cpp: In function ‘int main()’: user.cpp:17:9: warning: unused variable ‘mm’ [-Wunused-variable] int mm,mmm; ^ user.cpp:17:12: warning: unused variable ‘mmm’ [-Wunused-variable] int mm,mmm; ^ user.cpp:12:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desc2.in","r",stdin); ^ user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desc2.out","w",stdout); ^ user.cpp:14:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&k,&x); ^