Compilare: user.cpp: In function ‘int main()’: user.cpp:28:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] pair<int, int> chosen = *(S[c].begin()); ^ user.cpp:30:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] pop_heap(S[c].begin(), S[c].end()); ^ user.cpp:30:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] pop_heap(S[c].begin(), S[c].end()); ^ user.cpp:31:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] S[c].pop_back(); ^ user.cpp:14:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitici5.in", "r", stdin); ^ user.cpp:15:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitici5.out", "w", stdout); ^