Compilare: user.cpp: In function ‘int main()’: user.cpp:22:66: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i = 1;i <= n;++i) dp[i][i] = inf,dp[i][i+1] = s[c[i]][c[i+1]]; ^ user.cpp:22:74: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i = 1;i <= n;++i) dp[i][i] = inf,dp[i][i+1] = s[c[i]][c[i+1]]; ^ user.cpp:31:126: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int j = i;j <= i + len - 1;++j) dp[i][i+len-1] = min(dp[i][i+len-1],dp[i+1][j-1] + dp[j+1][i+len-1] + s[c[i]][c[j]]); ^ user.cpp:31:132: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int j = i;j <= i + len - 1;++j) dp[i][i+len-1] = min(dp[i][i+len-1],dp[i+1][j-1] + dp[j+1][i+len-1] + s[c[i]][c[j]]); ^