View Compilation Error

0_0_17910239_26698.cpp: In function 'int main()':
0_0_17910239_26698.cpp:82:19: error: too few arguments to function 'void solve(int, int, int)'
         solve(rt,n);
                   ^
0_0_17910239_26698.cpp:38:6: note: declared here
 void solve(int u,int gf,int n)
      ^