【USACO 3.1】Score Inflation（完全背包）

完全背包。

http://train.usaco.org/usacoprob2?a=3Srffjlf4QI&S=inflate

/*
TASK:inflate
LANG:C++
URL:
*/
#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cstring>
#define ll long long
#define N 10005
int m,n,w[N],p[N],dp[N];
using namespace std;
int main() {
    freopen("inflate.in","r",stdin);
    freopen("inflate.out","w",stdout);
    scanf("%d%d",&m,&n);
    for(int i=1;i<=n;i++)
        scanf("%d%d",&p[i],&w[i]);
    for(int i=1;i<=n;i++)
    for(int j=w[i];j<=m;j++)
        if(dp[j-w[i]]+p[i]>dp[j])
            dp[j]=dp[j-w[i]]+p[i];
    int ans=0;
    for(int i=0;i<=m;i++)
    if(dp[i]>ans)ans=dp[i];
    printf("%d\n",ans);
    return 0;
}