Owl Get a Life

Compile Error

payraise.cpp:9:33: error: ‘vll’ has not been declared
9 | void update(ll n, ll x, ll val, vll& BIT){
| ^~~
payraise.cpp: In function ‘void update(ll, ll, ll, int&)’:
payraise.cpp:10:37: error: invalid types ‘int[ll {aka long long int}]’ for array subscript
10 | for (; x <= n; x += (x & -x)) BIT[x] += val;
| ^
payraise.cpp: At global scope:
payraise.cpp:13:17: error: ‘vll’ has not been declared
13 | ll getsum(ll x, vll& BIT){
| ^~~
payraise.cpp: In function ‘ll getsum(ll, int&)’:
payraise.cpp:15:41: error: invalid types ‘int[ll {aka long long int}]’ for array subscript
15 | for(; x >= 1; x -= x & -x) res += BIT[x];
| ^
payraise.cpp: At global scope:
payraise.cpp:19:31: error: ‘vll’ was not declared in this scope; did you mean ‘pll’?
19 | void dfs(ll u, ll par, vector&