疯狂的采药

 

传送门：https://www.luogu.org/problemnew/show/P1616

完全背包

#include<cstdio>
#include<algorithm> 
using namespace std;
inline int read()
{
    static char ch;
    while((ch = getchar()) < '0' || ch > '9');
    int ret = ch - 48;
    while((ch = getchar()) >= '0' && ch <= '9')
        ret = ret * 10 + ch - 48;
    return ret;
}
int t,m,v[10001],w[10001],f[100001];
int main()
{
    t = read();
    m = read();
    for(int i = 1;i <= m;i++)
    {
        w[i] = read();
        v[i] = read();
    }
    for(int i = 1;i <= m;i++)
    {
        for(int j = w[i];j <= t;j++)
        {
            f[j] = max(f[j],f[j-w[i]] + v[i]);            
        }
    }
    printf("%d",f[t]);
    return 0;
 }