View Compilation Error

0_0_35991209_2237.cpp:11:7: error: 'll' does not name a type
 const ll inf = 1e18;
       ^
0_0_35991209_2237.cpp: In function 'int main()':
0_0_35991209_2237.cpp:98:41: error: 'inf' was not declared in this scope
                         add(sz, sz - m, inf);
                                         ^
0_0_35991209_2237.cpp:100:41: error: 'inf' was not declared in this scope
                         add(sz, sz + m, inf);
                                         ^
0_0_35991209_2237.cpp:102:41: error: 'inf' was not declared in this scope
                         add(sz, sz - 1, inf);
                                         ^
0_0_35991209_2237.cpp:104:41: error: 'inf' was not declared in this scope
                         add(sz, sz + 1, inf);
                                         ^
0_0_35991209_2237.cpp:111:27: error: 'inf' was not declared in this scope
             ans += dfs(0, inf);
                           ^