Compilare: user.cpp: In function ‘void initialize()’: user.cpp:33:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Heap.size()<k) ^ user.cpp:39:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Heap.size()==k && Heap.top()<=a[ind].p) ^ user.cpp: In function ‘int main()’: user.cpp:71:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("peste.in", "r", stdin); ^ user.cpp:72:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("peste.out", "w", stdout); ^ user.cpp:74:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(Buffer, 1, Size, stdin); ^