Compilare: user.cpp: In function ‘void sweep()’: user.cpp:115:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < pos.size() && pos[p].x <= coord[i]) ^ user.cpp: In function ‘int main()’: user.cpp:127:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:130:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &duck[i].x, &duck[i].y); ^ user.cpp:133:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ user.cpp:136:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &wall[i].x, &wall[i].y); ^