#include <iostream> using namespace std; int t; int a[105]; int main() { cin >> t; while (t--) { int n, k; cin >> n >> k; for (int i = 1; i <= n; i++) { cin >> a[i]; } while (k--) { int u, v; cin >> u >> v; a[u]++; a[v]--; } bool f(1); for (int i = 1; i < n; i++) { if (a[i] > a[i + 1]) { cout << "No\n"; f = 0; break; } } if (f) cout << "Yes\n"; } }