Compilare: user.cpp: In function ‘int main()’: user.cpp:25:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (len == 2) dp[i][j] = s[c[i]][c[j]]; ^ user.cpp:25:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (len == 2) dp[i][j] = s[c[i]][c[j]]; ^ user.cpp:30:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][j] = min(dp[i][j],s[c[i]][c[k]] + dp[i+1][k-1] + dp[k+1][j]); ^ user.cpp:30:57: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][j] = min(dp[i][j],s[c[i]][c[k]] + dp[i+1][k-1] + dp[k+1][j]); ^