Compilare: user.cpp: In function ‘int main()’: user.cpp:22:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void read()’: user.cpp:32:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(cin,"%d",&n); ^ user.cpp:36:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(cin,"%d %d",&v[i].x,&v[i].y); ^ user.cpp: In function ‘void solve()’: user.cpp:91:29: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] muc[urm][m].x=nr; ^