#include <iostream>
#include <vector>
using namespace std;

int main() {
    int N, M, T;
    cin >> N >> M >> T;
    int Room[10005];
    for (int i = 1; i < N; i++) cin >> Room[i];
    int x;
    vector<int> y(N + 1，0);

    for (int i = 1; i <= M; i++) cin >> x >> y[x];

    for (int i = 1; i < N; i++) T = T - Room[i] + y[i];

    if (T <= 0)
        cout << "No" << endl;
    else
        cout << "Yes" << endl;
    return 0;
}

/sandbox/1/a.cpp: In function 'int main()':
/sandbox/1/a.cpp:13:21: error: unable to find numeric literal operator 'operator""\U0000ff0c0'
   13 |     vector<int> y(N+1，0);
      |                     ^~~~
/sandbox/1/a.cpp:13:21: note: use '-fext-numeric-literals' to enable more built-in suffixes