View Compilation Error

0_0_26198699_20244.cpp:15:1: error: 'll' does not name a type
 ll gcd(ll a,ll b){return b==0?a:gcd(b,a%b);}
 ^
0_0_26198699_20244.cpp:16:1: error: 'll' does not name a type
 ll lcm(ll a,ll b){ll gg=gcd(a,b);a/=gg;if(a<=LLONG_MAX/b) return a*b;return LLONG_MAX;}
 ^