#include "bits/stdc++.h"
using namespace std;
#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr << "hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); //can be used by calling rng() or shuffle(A, A+n, rng)
inline long long rand(long long x, long long y) { return (rng() % (y+1-x)) + x; } //inclusivesss
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }
typedef long long ll;
typedef long double ld;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
typedef pair<ll,ll>pi; typedef pair<ll,pi>spi; typedef pair<pi,pi>dpi;
#define LLINF ((long long)1e18)
#define INF int(1e9+1e6)
#define MAXN (100006)
ll n, m, k, old[MAXN];
vector<int> v[MAXN];
pi A[MAXN];
struct node{
ll prior;
int sz, key;
ll val, lazy, mx;
node*l=0,*r=0;
};
typedef node* pnode;
vector<pnode> treap;
pnode init(ll _key,ll nval){
pnode tmp=new node;
tmp->prior=rng(), tmp->sz=1, tmp->key=_key, tmp->val=nval, tmp->lazy=0, tmp->mx=nval;
tmp->l=0, tmp->r=0;
return tmp;
}
void push(pnode t){
if(!t)return;
t->val += t->lazy, t->mx += t->lazy;
if(t->l) t->l->lazy+=t->lazy;
if(t->r) t->r->lazy+=t->lazy;
t->lazy=0;
}
void pull(pnode t){
if(!t)return;
if(t->l) push(t->l);
if(t->r) push(t->r);
t->mx=max({(t->l?t->l->mx:0),(t->r?t->r->mx:0),t->val});
}
void upd(pnode t){
if(!t) return;
t->sz = (t->l?t->l->sz:0) + (t->r?t->r->sz:0) + 1;
}
void split(pnode t,pnode&l,pnode&r,ll nval){
if(!t) return void(l=r=0);
push(t);
if(t->key <= nval) split(t->r, t->r, r, nval), l=t;
else split(t->l,l,t->l,nval),r=t;
upd(t), pull(t);
}
void merge(pnode&t, pnode l,pnode r){
if(!l || !r) return void(t=l?l:r);
push(l),push(r);
if(l->prior<r->prior) merge(r->l,l,r->l), t=r;
else merge(l->r,l->r,r),t=l;
upd(t), pull(t);
}
void unite(pnode&t,pnode l,pnode r){
if(!l || !r) return void(t=l?l:r);
push(l),push(r);
if(l->prior < r->prior) swap(l,r);
pnode L,R;
split(r,L,R,l->key);
unite(l->l,l->l,L);
unite(l->r,l->r,R);
t=l;
upd(t);
pull(t);
}
bool find(pnode&t,ll key){
if(!t) return 0;
if(t->key==key) return 1;
else if(t->key>key) return find(t->l,key);
else return find(t->r,key);
}
void update(pnode&t,ll l,ll r,ll nval){
pnode L,R;
split(t,L,t,l-1);
split(t,t,R,r);
if(t) t->lazy += nval;
merge(t,t,R);
merge(t,L,t);
}
ll rmq(pnode&t,ll l,ll r){
pnode L,R;
split(t,L,t,l-1);
split(t,t,R,r);
ll ans=t ? t->mx+t->lazy : 0;
merge(t,t,R);
merge(t,L,t);
return ans;
}
vector<int> s;
void it(pnode t){
if(!t) return;
it(t->l);
s.pb(t->key);
it(t->r);
}
ll memo;
void dfs(int x,int p){
old[x]=-1;
for(auto i:v[x]) if(i^p) {
dfs(i, x);
if(old[x]==-1 || (treap[old[i]]?treap[old[i]]->sz:0)>(treap[old[x]]?treap[old[x]]->sz:0)) old[x]=old[i];
}
if(old[x]==-1){
old[x]=treap.size();
treap.eb(pnode());
}
// i is updated by j, where j is largest < i
for(auto i:v[x]) if((i^p) && (old[i]^old[x])) {
s.clear();
it(treap[old[i]]);
vector<ll> pre;
for(auto j=s.begin();j!=s.end();++j){
pre.eb(rmq(treap[old[x]],0,*j));
}
ll co=0;
for(auto j=s.begin();j!=s.end();++j){
ll myval=rmq(treap[old[i]],*j,*j);
ll b4=rmq(treap[old[x]],0,*j);
if(!find(treap[old[x]],*j))unite(treap[old[x]],treap[old[x]],init(*j,myval+pre[co])),memo=myval+pre[co];
else if(myval+pre[co]>(memo=rmq(treap[old[x]],*j,*j))){
update(treap[old[x]],*j,*j,-memo),
update(treap[old[x]],*j,*j,myval+pre[co]);
memo=myval+pre[co];
}
if(b4<memo)
update(treap[old[x]],(*j)+1, INF, memo-b4);
++ co;
}
}
if(A[x].f){
ll pre=rmq(treap[old[x]],0,A[x].f);
if(!find(treap[old[x]],A[x].f))unite(treap[old[x]],treap[old[x]],init(A[x].f,A[x].s+pre));
else if((memo=rmq(treap[old[x]],A[x].f,A[x].f))==pre) update(treap[old[x]],A[x].f,A[x].f,A[x].s);
else update(treap[old[x]],A[x].f,A[x].f,-memo),update(treap[old[x]],A[x].f,A[x].f,pre+A[x].s);
}
if(x==1){
cout<<rmq(treap[old[x]],0,INF)<<'\n';
}
}
#define gc _getchar_nolock
void in(ll&x){
x=0;
char ch=gc();
while(ch<'0'||ch>'9')ch=gc();
while(ch>='0'&&ch<='9'){
x=(x<<3)+(x<<1)+(ch&15);
ch=gc();
}
}
int main(){
FAST
in(n),in(m),in(k);
FOR(i,2,n){
ll p;in(p);
v[p].eb(i), v[i].eb(p);
}
FOR(i,1,m){
ll a;in(a);
in(A[a].f),in(A[a].s);
}
dfs(1,1);
}
Compilation message
magictree.cpp: In function 'void in(ll&)':
magictree.cpp:163:12: error: '_getchar_nolock' was not declared in this scope
#define gc _getchar_nolock
^
magictree.cpp:166:10: note: in expansion of macro 'gc'
char ch=gc();
^~
magictree.cpp:163:12: note: suggested alternative: 'getchar_unlocked'
#define gc _getchar_nolock
^
magictree.cpp:166:10: note: in expansion of macro 'gc'
char ch=gc();
^~
