这题多少有点问题

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int t;
    cin >> t;
    
    while (t--) {
        int s, n;
        cin >> s >> n;
        
        vector<int> dragons(n);
        vector<int> rewards(n);
        
        for (int i = 0; i < n; i++) {
            cin >> dragons[i] >> rewards[i];
        }
        
        // 对龙按力量值进行排序
        sort(dragons.begin(), dragons.end());
        
        bool canBeatAllDragons = true;
        
        for (int i = 0; i < n; i++) {
            if (s > dragons[i]) {
                s += rewards[i]; // 获得击败龙的奖励力量值
            } else {
                canBeatAllDragons = false;
                break;
            }
        }
        
        if (canBeatAllDragons) {
            cout << "YES" << endl;
        } else {
            cout << "NO" << endl;
        }
    }
    
    return 0;
}