Compilare: user.cpp: In function ‘int main()’: user.cpp:20:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i+1] = s[c[i]][c[i+1]]; ^ user.cpp:20:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i+1] = s[c[i]][c[i+1]]; ^ user.cpp:29:91: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i+len] = min(dp[i][i+len],dp[i+1][j-1] + dp[j+1][i+len] + s[c[i]][c[j]]); ^ user.cpp:29:97: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i+len] = min(dp[i][i+len],dp[i+1][j-1] + dp[j+1][i+len] + s[c[i]][c[j]]); ^