View Compilation Error

0_0_26045872_6771.cpp: In function 'int merge(int, int)':
0_0_26045872_6771.cpp:70:5: error: redefinition of 'int merge(int, int)'
 int merge(int rt, int prt) {
     ^
0_0_26045872_6771.cpp:58:5: note: 'int merge(int, int)' previously defined here
 int merge(int rt,int pre)
     ^