foo.cc: In function 'int main()':
foo.cc:23:6: error: 'i' was not declared in this scope
   23 |  for(i=0; i<n; i++)
      |      ^
foo.cc:25:7: error: 'j' was not declared in this scope
   25 |   for(j=0; j<m; j++)
      |       ^
foo.cc:29:6: error: 'i' was not declared in this scope
   29 |  for(i=0; i<n; i++)
      |      ^
foo.cc:31:7: error: 'j' was not declared in this scope
   31 |   for(j=0; j<m; j++)
      |       ^

Found 10 testcases.
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