foo.cc: In function 'std::string mcl(std::string, std::string)':
foo.cc:13:15: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   13 |         memset(a,0,100005);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc:14:15: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   14 |         memset(b,0,100005);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc:15:15: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   15 |         memset(c,0,100005);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc: In function 'std::string add(std::string, std::string)':
foo.cc:67:15: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   67 |         memset(a,0,100005);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc:68:15: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   68 |         memset(b,0,100005);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc:69:15: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
   69 |         memset(c,0,100005);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:155:13: warning: unused variable 'u' [-Wunused-variable]
  155 |         int u=0;
      |             ^

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