Compilare: user.cpp: In function ‘int main()’: user.cpp:21:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y,lgA,lgB,A,B,aux,noA,nrA,noB,nrB,ans=0; ^ user.cpp:21:13: warning: unused variable ‘x’ [-Wunused-variable] int i,j,x,y,lgA,lgB,A,B,aux,noA,nrA,noB,nrB,ans=0; ^ user.cpp:21:15: warning: unused variable ‘y’ [-Wunused-variable] int i,j,x,y,lgA,lgB,A,B,aux,noA,nrA,noB,nrB,ans=0; ^ user.cpp:18:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("simpla.in","r",stdin); ^ user.cpp:19:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("simpla.out","w",stdout); ^ user.cpp:24:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&A,&B); ^