foo.cc: In function 'int main()':
foo.cc:14:12: error: conflicting declaration 'std::string n'
   14 |     string n,m;
      |            ^
foo.cc:7:9: note: previous declaration as 'int n'
    7 |     int n;
      |         ^
foo.cc:16:9: error: request for member 'find' in 'a', which is of non-class type 'std::string [1000]' {aka 'std::__cxx11::basic_string<char> [1000]'}
   16 |     a[a.find(n)]=m;
      |         ^~~~

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