Compilare: user.cpp: In function ‘int main()’: user.cpp:42:28: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x==0 && y==1 || x==1 && y==0) ^ user.cpp:18:23: warning: unused variable ‘k’ [-Wunused-variable] int n,m,i,j,nr=1,x,y,k,w,v,max=0,o,p,a[51][51],abcd; ^ user.cpp:18:35: warning: variable ‘o’ set but not used [-Wunused-but-set-variable] int n,m,i,j,nr=1,x,y,k,w,v,max=0,o,p,a[51][51],abcd; ^ user.cpp:18:37: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] int n,m,i,j,nr=1,x,y,k,w,v,max=0,o,p,a[51][51],abcd; ^ user.cpp:16:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("padure.in","r",stdin); ^ user.cpp:17:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("padure.out","w",stdout); ^ user.cpp:19:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ",&n,&m); ^