Compilare: main.cpp: In function 'int main()': main.cpp:20:20: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[i]][0] = max(dp[s[i]][0], dp[j][1] + 1); ^ main.cpp:20:38: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[i]][0] = max(dp[s[i]][0], dp[j][1] + 1); ^ main.cpp:23:24: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[i]][1] = max(dp[s[i]][1], dp[j][0] + 1); ^ main.cpp:23:42: warning: array subscript has type 'char' [-Wchar-subscripts] dp[s[i]][1] = max(dp[s[i]][1], dp[j][0] + 1); ^