foo.cc: In function 'int main()':
foo.cc:7:37: warning: unused variable 'n1' [-Wunused-variable]
    7 |         string s;getline(cin,s);int n1=s.length();
      |                                     ^~
foo.cc:9:45: warning: unused variable 'n3' [-Wunused-variable]
    9 |         string nname;getline(cin,nname);int n3=nname.length();
      |                                             ^~

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