Compilare: user.cpp: In function ‘void compute(int, int, int)’: user.cpp:39:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (unsigned int index = 0; index < two[c1][c2].size(); ++index) ^ user.cpp:39:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (unsigned int index = 0; index < two[c1][c2].size(); ++index) ^ user.cpp:40:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[a][b][two[c1][c2][index] - 'A'] = true; ^ user.cpp:40:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[a][b][two[c1][c2][index] - 'A'] = true; ^ user.cpp: In function ‘int main()’: user.cpp:59:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] one[s[0]].push_back(x); ^ user.cpp:61:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] two[s[0]][s[1]].push_back(x); ^ user.cpp:61:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] two[s[0]][s[1]].push_back(x); ^ user.cpp:73:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (unsigned int j = 0; j < one[s[i]].size(); ++j) ^ user.cpp:74:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i][one[s[i]][j] - 'A'] = true; ^