Compilare: user.cpp: In function ‘int minn(std::vector<int>)’: user.cpp:19:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size (); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:63:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum[i] = sum[i + 1] + ap[st[i]]; ^ user.cpp:97:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int h = 0; h < ord.size (); ++h) ^ user.cpp:124:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int h = 0; h < ord.size (); ++h) ^ user.cpp:53:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("7segmente.out", "w", stdout); ^