自家测得是对的，而落谷上则只有20分！！蒟蒻求助

代码如下

#include <iostream>
using namespace std;
int main()
{
	int value_apple_sum;
	int value_strength_sum;
	int value_stool_height;
	int value_body_height;
	int ans = 0;
	cin >> value_apple_sum >> value_strength_sum >> value_stool_height >> value_body_height;
	int* value_apple_high = new int[value_apple_sum];
	int* value_need_strength = new int[value_apple_sum];
	for (int i = 0; i < value_apple_sum; i++)
	{
		cin >> value_apple_high[i] >> value_need_strength[i];
		if (value_body_height + value_stool_height >= value_apple_high[i] && value_strength_sum - value_need_strength[i] >= 0)
		{
			ans++;
			value_strength_sum -= value_need_strength[i];
		}
	}
	cout << ans;
	return 0;
}