View Compilation Error

0_0_26926134_11386.cpp: In function 'll quick_pow(ll, ll)':
0_0_26926134_11386.cpp:57:4: error: redefinition of 'll quick_pow(ll, ll)'
 ll quick_pow(ll a,ll b)
    ^
0_0_26926134_11386.cpp:6:4: note: 'll quick_pow(ll, ll)' previously defined here
 ll quick_pow(ll a,ll b)
    ^
0_0_26926134_11386.cpp: In function 'int main()':
0_0_26926134_11386.cpp:70:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_26926134_11386.cpp:19:5: note: 'int main()' previously defined here
 int main()
     ^