```
if(a+b>=n&&s>c[i].yi)
```
改为
```
if(a+b>=c[i].xi&&s>c[i].yi)
```
by huang_yue @ 2019-08-22 15:33:16
不对，是改为
```
if(a+b>=c[i].xi&&s>=c[i].yi)
```
by huang_yue @ 2019-08-22 15:33:40
```cpp
#include<bits/stdc++.h>
using namespace std;
struct tao
{
int xi;
int yi;
}c[5100];
bool cmp(tao a,tao b)
{
return a.yi<b.yi;
}
int main()
{int n,a,s,b,sum=0;
cin>>n>>s>>a>>b;
for(int i=1;i<=n;i++)
{
cin>>c[i].xi;
cin>>c[i].yi;
}
sort(c+1,c+n+1,cmp);
for(int i=1;i<=n;i++)
{
if(a+b>=c[i].xi&&s>=c[i].yi)
{
sum++;
s-=c[i].yi;
}
}
cout<<sum;
return 0;
}
```
by zmx200767 @ 2019-08-22 16:31:01
[我做的AC题解](https://www.luogu.org/blog/are/yi-pian-jian-dan-di-tao-tao-zhai-peng-guo-sheng-ji-ban-ti-xie)
by chenpengda @ 2019-08-24 14:13:33