Compilare: user.cpp: In function ‘void removeEdge(int, int)’: user.cpp:14:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<v[x].size(); i++) ^ user.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<v[y].size(); i++) ^ user.cpp: In function ‘int query(int, int)’: user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[varf].size();i++) ^ user.cpp:21:25: warning: unused variable ‘k’ [-Wunused-variable] int prim,ultim,varf,k,i,ok=0; ^ user.cpp: In function ‘int main()’: user.cpp:49:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&M); ^ user.cpp:52:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:66:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int type, x, y; scanf("%d%d%d",&type,&x,&y); ^