Compilare: user.cpp: In function ‘void solve()’: user.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(Pq.size() > K) ^ user.cpp: In function ‘void read()’: user.cpp:27:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &K); ^ user.cpp:30:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^