View Compilation Error

0_0_28182529_15511.cpp: In function 'int DFS(int, int, bool, bool)':
0_0_28182529_15511.cpp:38:5: error: redefinition of 'int DFS(int, int, bool, bool)'
 int DFS(int len, int las, bool up, bool qd)
     ^
0_0_28182529_15511.cpp:25:5: note: 'int DFS(int, int, bool, bool)' previously defined here
 int DFS(int len, int las, bool up, bool qd)
     ^