/in/foo.cc: In function 'int main()':
/in/foo.cc:48:8: warning: unused variable 'fx1' [-Wunused-variable]
    int fx1=find(x+n);
        ^~~
/in/foo.cc:49:8: warning: unused variable 'fy1' [-Wunused-variable]
    int fy1=find(y+n);
        ^~~
/in/foo.cc:50:8: warning: unused variable 'fx2' [-Wunused-variable]
    int fx2=find(x+n*2);
        ^~~
/in/foo.cc:51:8: warning: unused variable 'fy2' [-Wunused-variable]
    int fy2=find(y+n*2);
        ^~~
/in/foo.cc:68:8: warning: unused variable 'fx1' [-Wunused-variable]
    int fx1=find(x+n);
        ^~~
/in/foo.cc:69:8: warning: unused variable 'fy1' [-Wunused-variable]
    int fy1=find(y+n);
        ^~~
/in/foo.cc:70:8: warning: unused variable 'fx2' [-Wunused-variable]
    int fx2=find(x+2*n);
        ^~~
/in/foo.cc:71:8: warning: unused variable 'fy2' [-Wunused-variable]
    int fy2=find(y+n*2);
        ^~~
/in/foo.cc:30:6: warning: unused variable 'cnt' [-Wunused-variable]
  int cnt=0;
      ^~~