/in/foo.cc: In function 'void splay(int, int)':
/in/foo.cc:148:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     for(int fa;fa=f[x];rotate(x))
                      ^
/in/foo.cc: In function 'int find(int, int)':
/in/foo.cc:174:9: warning: unused variable 'pd' [-Wunused-variable]
     int pd=now;
         ^~
/in/foo.cc: In function 'void del(int, int)':
/in/foo.cc:200:8: warning: unused variable 'whatever' [-Wunused-variable]
    int whatever=fin(id,x);
        ^~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:336:13: warning: unused variable 's' [-Wunused-variable]
     int i,j,s,p,q;
             ^
/in/foo.cc:336:15: warning: unused variable 'p' [-Wunused-variable]
     int i,j,s,p,q;
               ^
/in/foo.cc:336:17: warning: unused variable 'q' [-Wunused-variable]
     int i,j,s,p,q;
                 ^