@[a1111_xh1215](/user/1007287) 数组开小了，这题n有2e6级别，5000是m的范围
by querycol @ 2023-12-23 16:23:13
@[querycol](/user/478039) 这边建议看看题目，输入 $m$ 行，开到 $m$ 没问题啊
by Ace_FutureDream @ 2023-12-23 16:24:47
@[querycol](/user/478039) 5000可以
by a1111_xh1215 @ 2023-12-23 16:25:14
```cpp
#include<bits/stdc++.h>
using namespace std;
struct sss
{
int c;
int b;
}a[5010];
bool xiaomao(sss x,sss y)
{
return x.c<y.c;
}
int main()
{
int n,m;
cin>>n>>m;
for(int i=1;i<=m;i++)
{
cin>>a[i].c>>a[i].b;
}
sort(a+1,a+1+m,xiaomao);
long long tnt=0,nn=0;
for(int i=1;i<=m;i++)
{
if(a[i].b+nn<n)
{
tnt+=a[i].c*a[i].b;
nn+=a[i].b;
}
else
{
tnt+=(n-nn)*a[i].c;
break;
}
}
cout<<tnt;
return 0;
}
```
by _txb_ @ 2023-12-23 16:28:02
@[a1111_xh1215](https://www.luogu.com.cn/user/1007287)
[能AC](https://www.luogu.com.cn/record/140692898)
by _txb_ @ 2023-12-23 16:29:01
@[tanxubin](/user/869291) 谢，已关
by a1111_xh1215 @ 2023-12-23 16:40:16
为什么cmp函数里边是≤就不行，改成＜就好了？
by wangdelta @ 2024-01-12 15:25:34
@[wangdelta](/user/516406)
小于等于？
请问刚好等于这么排
by LoTLaneyyat @ 2024-01-23 20:47:20