#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
using namespace std;

const ll N=2e5+5;
const ll INF=1e9;
bool arr[INF];

void solve(){
    ll n,m; cin>>n>>m;
    
    ll tree[n];
    for(int i=0;i<n;i++){
        cin>>tree[i];
        arr[tree[i]]=1;
    }
    vector<pair<ll,pair<ll,ll>>>v(n);
    for(int i=0;i<n;i++){
        cin>>v[i].first>>v[i].second.first>>v[i].second.second;
    }
    ll sum=0;
    for(int i=0;i<n;i++){
        if(arr[v[i].first]==1){
            sum+=v[i].second.second;
            // cout<<v[i].second.second;
        }
        else{
            ll l=0,r=n-1;
            ll low,hi;
            while(l<=r){
                ll mid=(l+r)/2;
                if(tree[i]<v[i].first){
                    l=mid+1;
                }
                else{
                    low=mid;
                    r=mid-1;
                }
            }
            l=0,r=n-1;
            while(l<=r){
                ll mid=(l+r)/2;
                if(tree[i]>v[i].first){
                    r=mid-1;
                }
                else{
                    hi=mid;
                    l=mid+1;
                }
            }
            ll dist=min(abs(v[i].first-tree[low]),abs(v[i].first-tree[hi]));
            if(dist<v[i].second.second-v[i].second.first){
                sum+=v[i].second.second-dist;
                // cout<<v[i].second.second-dist<<endl;
            }
            else{
                sum+=v[i].second.first;
                // cout<<v[i].second.first<<endl;
            }
        }
    }
    cout<<sum<<endl;
}

int main(){
    ll tc; tc=1;
    while(tc--){
        solve();
    }
}