/in/foo.cc: In function 'int main()':
/in/foo.cc:26:37: warning: array subscript has type 'char' [-Wchar-subscripts]
     dp[i][0]=dp[i-1][0]+w[ecode[a[i]]][4];
                                     ^
/in/foo.cc:26:38: warning: array subscript has type 'char' [-Wchar-subscripts]
     dp[i][0]=dp[i-1][0]+w[ecode[a[i]]][4];
                                      ^
/in/foo.cc:28:40: warning: array subscript has type 'char' [-Wchar-subscripts]
     dp[0][j]=dp[0][j-1]+w[4][ecode[b[j]]];
                                        ^
/in/foo.cc:28:41: warning: array subscript has type 'char' [-Wchar-subscripts]
     dp[0][j]=dp[0][j-1]+w[4][ecode[b[j]]];
                                         ^
/in/foo.cc:32:20: warning: array subscript has type 'char' [-Wchar-subscripts]
    int x=ecode[a[i]],y=ecode[b[j]];
                    ^
/in/foo.cc:32:34: warning: array subscript has type 'char' [-Wchar-subscripts]
    int x=ecode[a[i]],y=ecode[b[j]];
                                  ^