/in/foo.cc: In function 'int main()':
/in/foo.cc:7:13: warning: unused variable 'k' [-Wunused-variable]
    7 |         int k,a[10005],b[10005],c[10005],d[10005],n1,n2,n3;
      |             ^
/in/foo.cc:7:24: warning: unused variable 'b' [-Wunused-variable]
    7 |         int k,a[10005],b[10005],c[10005],d[10005],n1,n2,n3;
      |                        ^
/in/foo.cc:7:33: warning: unused variable 'c' [-Wunused-variable]
    7 |         int k,a[10005],b[10005],c[10005],d[10005],n1,n2,n3;
      |                                 ^
/in/foo.cc:7:42: warning: unused variable 'd' [-Wunused-variable]
    7 |         int k,a[10005],b[10005],c[10005],d[10005],n1,n2,n3;
      |                                          ^
/in/foo.cc:7:54: warning: unused variable 'n2' [-Wunused-variable]
    7 |         int k,a[10005],b[10005],c[10005],d[10005],n1,n2,n3;
      |                                                      ^~
/in/foo.cc:7:57: warning: unused variable 'n3' [-Wunused-variable]
    7 |         int k,a[10005],b[10005],c[10005],d[10005],n1,n2,n3;
      |                                                         ^~