```cpp
if(b+a>=ans[i].x)
++sum;
s-=ans[i].y;
```
应改为
```cpp
if(b+a>=ans[i].x){
++sum;
s-=ans[i].y;
}
```
by szlh_yanlikun @ 2023-08-22 09:31:20
@[szlh_yanlikun](/user/672223)
谢谢，我刚刚检查出来了，不过还是很谢谢您
by danaqi_ @ 2023-08-22 09:34:08
不客气
by szlh_yanlikun @ 2023-08-22 09:35:07
```cpp
#include<cstdio>
#include<iostream>
#include<cstring>
#include<string>
#include<cmath>
#include<algorithm>
using namespace std;
int n,s,a,b,sum;
struct add{
int x,y;
}ans[5005];
bool cmp(add a,add b){return a.y<b.y;}
int main(){
scanf("%d%d%d%d",&n,&s,&a,&b);
for(int i=1;i<=n;++i)
scanf("%d%d",&ans[i].x,&ans[i].y);
/*for(int i=1;i<=n;++i){
for(int j=1;j<=n-i;++j){
if(ans[j].y>ans[j+1].y)
swap(ans[j],ans[j+1]);
}
}*/
sort(ans+1,ans+1+n,cmp);
int i=1;
while(s-ans[i].y>=0&&i<=n){
if(b+a>=ans[i].x){
++sum;
s-=ans[i].y;
}//既然不摘为什么减少体力（
++i;
}
printf("%d",sum);
return 0;
}
```
有时候，两个标点就占40分
有时候，bug找一小时都找不回来十分（
by 1q2zb @ 2023-08-22 09:38:11
@[1q2zb](/user/866783)
cmp用的比较少不太会写，这里就没用
by danaqi_ @ 2023-08-22 15:47:22
试试这种：
```cpp
#include<bits/stdc++.h>
using namespace std;
struct apple {
int high;
int liqi;
} aa[5001];
bool cmp(apple a,apple b) {
return a.liqi<b.liqi;
}
int main() {
int n,s,a,b,ans=0;
cin>>n>>s>>a>>b;
for(int i=0; i<n; i++) {
scanf("%d%d",&aa[i].high,&aa[i].liqi);
}
sort(aa,aa+n,cmp);
for(int i=0; i<n; i++) {
if(s<=0) break;
if(aa[i].high<=(a+b) && aa[i].liqi<=s) {
ans++;
s-=aa[i].liqi;
}
}
cout<<ans<<endl;
return 0;
}
```
by the_time_end @ 2023-08-22 16:41:53