You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
#include <bits/stdc++.h>
|
|
|
|
|
|
|
|
|
|
using namespace std;
|
|
|
|
|
typedef long long LL;
|
|
|
|
|
const int N = 5010;
|
|
|
|
|
int n, s; //苹果数 n,力气 s
|
|
|
|
|
int a, B; //椅子的高度a,陶陶手伸直的最大长度b。
|
|
|
|
|
|
|
|
|
|
struct apple {
|
|
|
|
|
int x, y;
|
|
|
|
|
} apples[N];
|
|
|
|
|
|
|
|
|
|
bool cmp(const apple &a, const apple &b) {
|
|
|
|
|
return a.y < b.y;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int cnt; //结果数
|
|
|
|
|
|
|
|
|
|
//每行两个数 苹果高度 xi,摘这个苹果需要的力气yi
|
|
|
|
|
int main() {
|
|
|
|
|
cin >> n >> s >> a >> b;
|
|
|
|
|
for (int i = 1; i <= n; i++) cin >> apples[i].x >> apples[i].y;
|
|
|
|
|
//排序
|
|
|
|
|
sort(apples + 1, apples + 1 + n, cmp);
|
|
|
|
|
|
|
|
|
|
for (int i = 1; i <= n; i++)
|
|
|
|
|
if (a + b >= apples[i].x && s >= apples[i].y) {//能够的到,而且力气够用
|
|
|
|
|
cnt++;
|
|
|
|
|
s -= apples[i].y;
|
|
|
|
|
}
|
|
|
|
|
//输出大吉
|
|
|
|
|
cout << cnt << endl;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|