Compilare: main.cpp: In function 'void rollhash(int)': main.cpp:158:29: warning: array subscript has type 'char' [-Wchar-subscripts] now = now + unord[str[dr]]; ^ main.cpp:161:28: warning: array subscript has type 'char' [-Wchar-subscripts] now = now - unord[str[st]]; } } ^ main.cpp: In function 'Hash gethash(const string&)': main.cpp:174:23: warning: array subscript has type 'char' [-Wchar-subscripts] res = res + unord[ch]; ^ main.cpp: In function 'void initialize()': main.cpp:210:11: warning: array subscript has type 'char' [-Wchar-subscripts] unord[ch] = now; ^ main.cpp: In function 'int main()': main.cpp:219:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("shiroseq.in", "r", stdin); ^ main.cpp:220:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("shiroseq.out", "w", stdout); ^