View Compilation Error

0_0_20669377_10176.cpp: In function 'UL gcd(UL, UL)':
0_0_20669377_10176.cpp:53:4: error: redefinition of 'UL gcd(UL, UL)'
 UL gcd(UL u, UL v)
    ^
0_0_20669377_10176.cpp:6:4: note: 'UL gcd(UL, UL)' previously defined here
 UL gcd(UL u, UL v)
    ^
0_0_20669377_10176.cpp: In function 'UL lcm(UL, UL)':
0_0_20669377_10176.cpp:67:4: error: redefinition of 'UL lcm(UL, UL)'
 UL lcm(UL u, UL v)
    ^
0_0_20669377_10176.cpp:20:4: note: 'UL lcm(UL, UL)' previously defined here
 UL lcm(UL u, UL v)
    ^
0_0_20669377_10176.cpp: In function 'int main()':
0_0_20669377_10176.cpp:72:5: error: redefinition of 'int main()'
 int main(void)
     ^
0_0_20669377_10176.cpp:25:5: note: 'int main()' previously defined here
 int main(void)
     ^