View Compilation Error

0_0_22339502_6286.cpp: In function 'int F(int, int)':
0_0_22339502_6286.cpp:131:5: error: redefinition of 'int F(int, int)'
 int F(int root, int u) {
     ^
0_0_22339502_6286.cpp:81:5: note: 'int F(int, int)' previously defined here
 int F(int root, int u) {
     ^
0_0_22339502_6286.cpp:132:22: error: too many arguments to function 'int F(int, int)'
  int x = F(root, u, 1), y = FF(root, u);
                      ^
0_0_22339502_6286.cpp:81:5: note: declared here
 int F(int root, int u) {
     ^