#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
// My bug list :
// integer overflow
// 0based, 1based forgotten
// index out of bound
// n, m, i, j typo
// some cases are missing
const int MAX_N = 200010, MAX_M = 2005;
int n, h[MAX_N], m;
// y, c
vector<pair<int,int>> star[MAX_N];
//ll dp[MAX_M][MAX_M];
map<int,ll> dp[MAX_N];
ll tg[MAX_N];
// merge to b
void merge_dp(int a, int b) {
int H = h[b];
ll alow = 0, blow = 0;
while (dp[a].size() && dp[a].begin()->first <= H) {
chmax(alow, dp[a].begin()->second + tg[a]);
dp[a].erase(dp[a].begin());
}
while (dp[b].size() && dp[b].begin()->first <= H) {
chmax(blow, dp[b].begin()->second + tg[b]);
dp[b].erase(dp[b].begin());
}
tg[a] += blow, tg[b] += alow;
if (dp[a].size() > dp[b].size()) {
swap(dp[a], dp[b]), swap(tg[a], tg[b]);
}
for (auto [k, w] : dp[a]) {
chmax(dp[b][k], w + tg[a] - tg[b]);
}
// for (auto &[k, w] : dp[a]) w += blow;
// for (auto &[k, w] : dp[b]) w += alow;
//
// for (auto [k, w] : dp[a])
// chmax(dp[b][k], w);
// //chmax(dp[b][k], w + tg[a] - tg[b]);
dp[b][0] = alow + blow - tg[b];
}
int dfs(int l, int r) {
if (l > r) return n + 1;
if (l == r) {
for (auto [y, c] : star[l])
dp[l][y] = c;
return l;
}
int id = l;
for (int i = l;i <= r;++i)
if (h[i] > h[id]) id = i;
int ld = dfs(l, id-1), rd = dfs(id+1, r);
for (auto [y, c] : star[id])
dp[id][y] = c;
merge_dp(ld, id);
merge_dp(rd, id);
return id;
}
ll solve() {
int rt = dfs(1, n);
ll sum = 0;
for (int i = 1;i <= n;++i)
for (auto [y, c] : star[i])
sum += c;
ll mxg = 0;
for (auto [_, w] : dp[rt])
chmax(mxg, w + tg[rt]);
return sum - mxg;
}
int32_t main() {
ios_base::sync_with_stdio(0), cin.tie(0);
cin >> n;
for (int i = 1;i <= n;++i)
cin >> h[i];
cin >> m;
for (int x, y, c, i = 0;i < m;++i) {
cin >> x >> y >> c;
star[x].pb(y, c);
}
assert(n < MAX_M);
cout << solve() << '\n';
}
