Compilare: main.cpp: In function 'void print_sol(int&)': main.cpp:157:8: warning: statement has no effect [-Wunused-value] main.cpp:131:20: #define debug(...) (__VA_ARGS__) ~~~~~~~~~~~~~ main.cpp:157:8: debug(here); main.cpp:131:21: note: in definition of macro 'debug' #define debug(...) (__VA_ARGS__) ^~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:176:35: warning: array subscript has type 'char' [-Wchar-subscripts] parent[total] = last[v[total][0]]; ^ main.cpp:177:36: warning: array subscript has type 'char' [-Wchar-subscripts] len[total] = len[last[v[total][0]]] + 1; ^ main.cpp:178:38: warning: array subscript has type 'char' [-Wchar-subscripts] last[v[total][strlen(v[total]) - 1]] = total; ^ main.cpp:169:37: 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:171:39: 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); ^