foo.cc: In function 'int main()':
foo.cc:6:22: warning: unused variable 'x' [-Wunused-variable]
    6 |         int n1,n2,n3,x=0,y=0,n;
      |                      ^
foo.cc:6:26: warning: unused variable 'y' [-Wunused-variable]
    6 |         int n1,n2,n3,x=0,y=0,n;
      |                          ^
foo.cc:6:30: warning: unused variable 'n' [-Wunused-variable]
    6 |         int n1,n2,n3,x=0,y=0,n;
      |                              ^
foo.cc:21:25: warning: unused variable 's1' [-Wunused-variable]
   21 |         int i=0,s=n1+n2,s1=n3+n1,f1=0,g1=0;sort(d,d+n1+n2);
      |                         ^~
foo.cc:21:34: warning: unused variable 'f1' [-Wunused-variable]
   21 |         int i=0,s=n1+n2,s1=n3+n1,f1=0,g1=0;sort(d,d+n1+n2);
      |                                  ^~
foo.cc:21:39: warning: unused variable 'g1' [-Wunused-variable]
   21 |         int i=0,s=n1+n2,s1=n3+n1,f1=0,g1=0;sort(d,d+n1+n2);
      |                                       ^~

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