Compilare: user.cpp: In function ‘int main()’: user.cpp:47:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,x,y,z,q=1; ^ user.cpp:47:23: warning: unused variable ‘q’ [-Wunused-variable] int n,m,i,j,x,y,z,q=1; ^ user.cpp:45:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitici.in","r",stdin); ^ user.cpp:46:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitici.out","w",stdout); ^ user.cpp:49:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&k); ^ user.cpp:52:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&z); ^