(简单的01背包)你可以这样写:
```cpp
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
int w[200],c[200];
int n,V;
int f[50000];
int main()
{
scanf("%d%d",&V,&n);
for(int i=1;i<=n;i++) scanf("%d%d",&w[i],&c[i]);
for(int i=1;i<=n;i++) c[i]=w[i]*c[i];
for(int i=1;i<=n;i++)
for(int j=V;j>=w[i];j--)
f[j]=max(f[j],f[j-w[i]]+c[i]);
printf("%d",f[V]);
}
```
by 风灵无畏YY @ 2017-07-19 20:00:16
我懂了 谢谢大牛指点
by shuaijason @ 2017-07-19 22:32:06