Compilare: user.cpp: In function ‘void Del(int, int)’: user.cpp:16:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Ciclu(int)’: user.cpp:24:8: warning: unused variable ‘i’ [-Wunused-variable] { int i,j,y; ^ user.cpp:24:10: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,y; ^ user.cpp: In function ‘int main()’: user.cpp:63:9: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,x,y; ^ user.cpp:64:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.cpp:67:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] { fscanf(f,"%d %d",&x,&y); ^