代码
```cpp
#include<bits/stdc++.h>
#define maxn 10005
#define ll long long
using namespace std;
ll W,tw,n;
double ts,X;
double f[maxn];
struct edge
{
ll w;
double s;
}a[maxn];
inline ll read()
{
ll x=0,f=1;char c=getchar();
while(c<'0'||c>'9'){if(c=='=')f=-1;c=getchar();}
while(c>='0'&&c<='9'){x=x*10+c-'0';c=getchar();}
return x*f;
}
int main()
{
W=read();X=read(),n=read();
for(int i=1;i<=n;++i) a[i].w=read(),scanf("%lf",&a[i].s),a[i].s=X/a[i].s;
for(int i=1;i<=n;++i)
{
tw=a[i].w,ts=a[i].s;
f[i]=f[i-1]+a[i].s;
for(int j=i-1;a[j].w+tw<=W&&j>=1;--j)
{
ts=a[j].s<ts?ts:a[j].s;
f[i]=f[j-1]+ts<f[i]?f[j-1]+ts:f[i];
tw+=a[j].w;
}
}
printf("%.1lf ",f[n]*60);
return 0;
}
```
by Jy_Amoy @ 2018-10-30 16:43:45
emmm我数组开大了一点然后最后输出改成60.0就过了有点懵
by Jy_Amoy @ 2018-10-30 16:50:39
@[小埋好萌](/space/show?uid=32767) 建议重交，现在评测机确实有些问题
by StudyingFather @ 2018-10-30 16:59:57
@[StudyingFather](/space/show?uid=22030) 重交A了 谢谢了
by Jy_Amoy @ 2018-10-30 17:04:39