foo.cc: In function 'void BigTimes(BigInt&, BigInt&, BigInt&)':
foo.cc:53:27: error: too many arguments to function 'void Mul(BigInt&, int)'
   53 |         Mul(a,b.num[i],out);
      |                           ^
foo.cc:10:6: note: declared here
   10 | void Mul(BigInt &x, int y)
      |      ^~~
foo.cc:57:29: error: too many arguments to function 'void Mul(BigInt&, int)'
   57 |             Mul(out,10,other);
      |                             ^
foo.cc:10:6: note: declared here
   10 | void Mul(BigInt &x, int y)
      |      ^~~

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