Compilare: main.cpp: In function 'int32_t main()': main.cpp:173:27: warning: array subscript has type 'char' [-Wchar-subscripts] if(fav_size < (int)dp[c][s[0]].size()) ^ main.cpp:173:33: warning: array subscript has type 'char' [-Wchar-subscripts] if(fav_size < (int)dp[c][s[0]].size()) ^ main.cpp:175:25: warning: array subscript has type 'char' [-Wchar-subscripts] fav_size = (int)dp[c][s[0]].size(); ^ main.cpp:175:31: warning: array subscript has type 'char' [-Wchar-subscripts] fav_size = (int)dp[c][s[0]].size(); ^ main.cpp:179:9: warning: statement has no effect [-Wunused-value] main.cpp:131:20: #define debug(...) (__VA_ARGS__) ~~~~~~~~~~~~~ main.cpp:179:9: debug(fav_size); main.cpp:131:21: note: in definition of macro 'debug' #define debug(...) (__VA_ARGS__) ^~~~~~~~~~~ main.cpp:180:28: warning: array subscript has type 'char' [-Wchar-subscripts] if(fav_size + 1 > dp[s[0]][s.back()].size()) ^ main.cpp:180:38: warning: array subscript has type 'char' [-Wchar-subscripts] if(fav_size + 1 > dp[s[0]][s.back()].size()) ^ main.cpp:180:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(fav_size + 1 > dp[s[0]][s.back()].size()) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:182:11: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[0]][s.back()] = dp[fav_char][s[0]]; ^ main.cpp:182:21: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[0]][s.back()] = dp[fav_char][s[0]]; ^ main.cpp:182:36: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[0]][s.back()] = dp[fav_char][s[0]]; ^ main.cpp:182:42: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[0]][s.back()] = dp[fav_char][s[0]]; ^ main.cpp:183:11: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[0]][s.back()].emplace_back(s); ^ main.cpp:183:21: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[0]][s.back()].emplace_back(s); ^