/in/foo.cc: In function 'int main()':
/in/foo.cc:7:27: warning: unused variable 'a' [-Wunused-variable]
  for(int i=1;i<=m;i++)int a[i];
                           ^
/in/foo.cc:8:27: warning: unused variable 'z' [-Wunused-variable]
  for(int i=1;i<=m;i++)int z[i];
                           ^
/in/foo.cc:9:27: warning: unused variable 'x' [-Wunused-variable]
  for(int i=0;i<=k;i++)int x[i];
                           ^
/in/foo.cc:4:6: warning: unused variable 'temp' [-Wunused-variable]
  int temp,m,k,n=0;
      ^~~~