Compilare: main.cpp: In function 'int32_t main()': main.cpp:179:28: warning: array subscript has type 'char' [-Wchar-subscripts] parent[total] = last[s[0]]; ^ main.cpp:180:29: warning: array subscript has type 'char' [-Wchar-subscripts] len[total] = len[last[s[0]]] + 1; ^ main.cpp:181:16: warning: array subscript has type 'char' [-Wchar-subscripts] last[s.back()] = total; ^ main.cpp:172:6: warning: unused variable 'test' [-Wunused-variable] int test[NMAX]; ^~~~ main.cpp:167:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".in", "r", stdin); ^ main.cpp:169:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".out", "w", stdout); ^