Compilare: main.cpp: In function 'int main()': main.cpp:19:25: warning: array subscript has type 'char' [-Wchar-subscripts] in >> cost[i][j]; ^ main.cpp:19:28: warning: array subscript has type 'char' [-Wchar-subscripts] in >> cost[i][j]; ^ main.cpp:25:31: warning: array subscript has type 'char' [-Wchar-subscripts] dp[i][i+1] = cost[s[i]][s[i+1]]; ^ main.cpp:25:39: warning: array subscript has type 'char' [-Wchar-subscripts] dp[i][i+1] = cost[s[i]][s[i+1]]; ^ main.cpp:28:48: warning: array subscript has type 'char' [-Wchar-subscripts] dp[i][j] = dp[i+1][j-1] + cost[s[i]][s[j]]; ^ main.cpp:28:54: warning: array subscript has type 'char' [-Wchar-subscripts] dp[i][j] = dp[i+1][j-1] + cost[s[i]][s[j]]; ^