#include<bits/stdc++.h>
#include <vector>
using namespace std;
#define ll long long
#define ld long double
const ll M = 1e9+7;

int main() {
    ll n,m,ans=0,r=0;cin >> m >> n;set <ll> arr;
    for (ll i = 0; i < m; i++){ll a;cin >> a;arr.insert(a);}
    while(n--){
        ll cor,a,b;cin >> cor >> a >> b;
        auto it=arr.lower_bound(cor);
        auto _it=it;_it--;
        if(it==arr.end())it--;
        if(it==arr.begin())_it++;
        if(*it==cor)ans+=b;
        else ans+=max({a,b-abs(cor-*_it),b-abs(*it-cor)});
    }cout << ans;
}