foo.cc: In function 'int main()':
foo.cc:7:4: error: expected primary-expression before 'int'
  j=int mi(int a,int b);
    ^~~
foo.cc: In function 'int mi(int, int)':
foo.cc:14:10: error: 'mo' was not declared in this scope
       a%=mo;
          ^~
foo.cc:14:10: note: suggested alternative: 'mi'
       a%=mo;
          ^~
          mi

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