Compilare: user.cpp: In function ‘int dfs2(int)’: user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<m[nod].size();i++) ^ user.cpp: In function ‘void rezolva()’: user.cpp:51:15: warning: unused variable ‘poz’ [-Wunused-variable] int i,nod,poz,cur=0; ^ user.cpp:51:19: warning: unused variable ‘cur’ [-Wunused-variable] int i,nod,poz,cur=0; ^ user.cpp:54:9: warning: unused variable ‘rx’ [-Wunused-variable] int rx=x,ry=y,rz=z,sm=-4; ^ user.cpp:54:14: warning: unused variable ‘ry’ [-Wunused-variable] int rx=x,ry=y,rz=z,sm=-4; ^ user.cpp:54:19: warning: unused variable ‘rz’ [-Wunused-variable] int rx=x,ry=y,rz=z,sm=-4; ^ user.cpp:54:24: warning: unused variable ‘sm’ [-Wunused-variable] int rx=x,ry=y,rz=z,sm=-4; ^ user.cpp:55:9: warning: unused variable ‘nrsol’ [-Wunused-variable] int nrsol=0; ^ user.cpp: In function ‘int main()’: user.cpp:95:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.in","r",stdin); ^ user.cpp:96:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.out","w",stdout); ^ user.cpp:97:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp: In function ‘void rezolva()’: user.cpp:53:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&x,&y,&z); ^ user.cpp:65:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n1,&n2); ^ user.cpp: In function ‘int main()’: user.cpp:77:16: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(dfs2(nod)) ^ user.cpp:51:11: note: ‘nod’ was declared here int i,nod,poz,cur=0; ^