Compilare: user.cpp: In function ‘bool sorting(eu, eu)’: user.cpp:10:25: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a.x<b.x||a.x==b.x&&a.y<b.y) ^ user.cpp: In function ‘void update(int, int)’: user.cpp:22:31: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] poz+=(poz^(poz&poz-1)); ^ user.cpp: In function ‘int main()’: user.cpp:30:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plicuri.in","r",stdin); ^ user.cpp:31:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plicuri.out","w",stdout); ^ user.cpp:32:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:35:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&vc[i].x,&vc[i].y); ^