Compilare: user.cpp: In function ‘void bfsx(int)’: user.cpp:28:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[primul].size();i++) ^ user.cpp: In function ‘void bfsy(int)’: user.cpp:44:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[primul].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:57:16: warning: unused variable ‘l’ [-Wunused-variable] int x,xx,yy,i,l,cate=0,ct=0,lung,ppx=0,ppy=0; ^ user.cpp:57:25: warning: unused variable ‘ct’ [-Wunused-variable] int x,xx,yy,i,l,cate=0,ct=0,lung,ppx=0,ppy=0; ^ user.cpp:57:35: warning: unused variable ‘ppx’ [-Wunused-variable] int x,xx,yy,i,l,cate=0,ct=0,lung,ppx=0,ppy=0; ^ user.cpp:57:41: warning: unused variable ‘ppy’ [-Wunused-variable] int x,xx,yy,i,l,cate=0,ct=0,lung,ppx=0,ppy=0; ^ user.cpp:55:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("graf.in","r",stdin); ^ user.cpp:56:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("graf.out","w",stdout); ^ user.cpp:58:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:59:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:61:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&xx,&yy); ^