View Compilation Error

0_0_20446937_5658.cpp: In function 'int main()':
0_0_20446937_5658.cpp:5:2: error: 'nbsp' was not declared in this scope
     int n,m;
  ^
0_0_20446937_5658.cpp:16:73: error: 'else' without a previous 'if'
             else
                                                                         ^