Compilare: user.cpp: In function ‘int main()’: user.cpp:29:14: warning: unused variable ‘s’ [-Wunused-variable] bool s=0; ^ user.cpp:11:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,ct=0,ult=0; ^ user.cpp:11:17: warning: unused variable ‘ct’ [-Wunused-variable] int n,m,i,j,ct=0,ult=0; ^ user.cpp:13:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar2.in","r",stdin); ^ user.cpp:14:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar2.out","w",stdout); ^ user.cpp:15:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&xx); ^