Compilare: user.cpp: In function ‘int main()’: user.cpp:67:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i< p1.size(); i++) ^ user.cpp:73:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i< p2.size(); i++) ^ user.cpp:17:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ user.cpp:18:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &l1, &c1, &l2, &c2); ^ user.cpp:21:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &vx[i], &vy[i]); ^