View Compilation Error

0_0_26177922_2732.cpp: In function 'long long int gcd(long long int, long long int)':
0_0_26177922_2732.cpp:84:4: error: redefinition of 'long long int gcd(long long int, long long int)'
 LL gcd(LL a, LL b)
    ^
0_0_26177922_2732.cpp:15:4: note: 'll gcd(ll, ll)' previously defined here
 ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
    ^