#include<iostream>
#include<vector>
#include<algorithm>
#include<atcoder/modint>
#include<atcoder/convolution>
using namespace std;
using mint=atcoder::modint998244353;
int N,M,X;
int C[2<<17];
int A[2<<17],B[2<<17],Y[2<<17];
int ans[2<<17];
int main()
{
	cin>>N>>M>>X;
	for(int i=0;i<N;i++)cin>>C[i];
	for(int i=0;i<M;i++)cin>>A[i]>>B[i]>>Y[i];
	for(int col=1;col<=5;col++)
	{
		vector<mint>idx(N,mint::raw(0));
		for(int i=0;i<N;i++)if(C[i]==col)idx[i]=mint::raw(1);
		vector<mint>coef(N,mint::raw(0));
		for(int i=0;i<M;i++)if(B[i]==col)
		{
			coef[N-A[i]]+=mint::raw(Y[i]);
		}
		vector<mint>t=atcoder::convolution(idx,coef);
		for(int i=N-1;i<2*N-1;i++)ans[i-(N-1)]+=t[i].val();
	}
	int ret=0;
	for(int i=0;i<=N;i++)ret=max(ret,ans[i]+i*X);
	cout<<ret<<endl;
}