View Compilation Error

0_0_19362959_10503.cpp: In function 'void update(int, int, int, int, int&)':
0_0_19362959_10503.cpp:26:21: error: 'v' was not declared in this scope
    update(ls[old],p,v,l,m,ls[rt]);
                     ^
0_0_19362959_10503.cpp:28:21: error: 'v' was not declared in this scope
    update(rs[old],p,v,m+1,r,rs[rt]) ;
                     ^