View Compilation Error

0_0_14301765_19123.cpp: In function 'long long int gcd(long long int, long long int)':
0_0_14301765_19123.cpp:47:9: error: redefinition of 'long long int gcd(long long int, long long int)'
 __int64 gcd(__int64 x,__int64 y)
         ^
0_0_14301765_19123.cpp:6:9: note: 'long long int gcd(long long int, long long int)' previously defined here
 __int64 gcd(__int64 x,__int64 y)
         ^
0_0_14301765_19123.cpp: In function 'int main()':
0_0_14301765_19123.cpp:51:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_14301765_19123.cpp:10:5: note: 'int main()' previously defined here
 int main()
     ^