View Compilation Error

0_0_32490624_15282.cpp:8:13: error: '_int128' was not declared in this scope
 #define il6 _int128
             ^
0_0_32490624_15282.cpp:14:8: note: in expansion of macro 'il6'
 ll dfs(il6 n)
        ^
0_0_32490624_15282.cpp:15:1: error: expected ',' or ';' before '{' token
 {
 ^
0_0_32490624_15282.cpp: In function 'int main()':
0_0_32490624_15282.cpp:8:13: error: '_int128' was not declared in this scope
 #define il6 _int128
             ^
0_0_32490624_15282.cpp:32:9: note: in expansion of macro 'il6'
         il6 ans=dfs(n);
         ^
0_0_32490624_15282.cpp:33:17: error: 'ans' was not declared in this scope
         ll ans2=ans%mod;
                 ^