#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
ll n,m,k;
cin>>n>>m>>k;
vector<ll>g[n+5];
ll p[n+5];
bool line=true;
for(ll i=2;i<=n;i++){
cin>>p[i];
g[p[i]].pb(i);
line&=(p[i]==i-1);
}
ll u[m],d[m],w[m];
bool leaf=true;
vector<ll>day(n+5,0),pt(n+5,0);
for(ll i=0;i<m;i++){
cin>>u[i]>>d[i]>>w[i];
day[u[i]]=d[i];
pt[u[i]]=w[i];
}
if(k<=2){
ll dp[n+5][3];
memset(dp,0,sizeof dp);
for(ll i=n;i>=1;i--){
for(ll j=1;j<=2;j++){
if(j==1){
for(ll x:g[i]){
dp[i][1]+=dp[x][1];
}
if(day[i]==1) dp[i][1]+=pt[i];
}
else{
for(ll x:g[i]){
dp[i][2]+=max(dp[x][1],dp[x][2]);
}
if(day[i]==2) dp[i][2]+=pt[i];
}
}
}
cout<<max(dp[1][1],dp[1][2]);
}
}
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