View Compilation Error

0_0_14227048_23947.cpp: In function 'int main()':
0_0_14227048_23947.cpp:38:50: error: 'len' was not declared in this scope
                      for(int ii=i,jj=j; ii<n&&jj<len&&(str[ii][jj]=='R'|| str[ii][jj]=='G'); ii++,jj++)
                                                  ^
0_0_14227048_23947.cpp:38:56: error: 'str' was not declared in this scope
                      for(int ii=i,jj=j; ii<n&&jj<len&&(str[ii][jj]=='R'|| str[ii][jj]=='G'); ii++,jj++)
                                                        ^
0_0_14227048_23947.cpp:50:54: error: 'str' was not declared in this scope
                     for(int ii=i,jj=j; ii<n&&jj>=0&&(str[ii][jj]=='B'||str[ii][jj]=='G'); ii++,jj--)
                                                      ^