OJ-Problems-Source/HDOJ/3448_autoAC.cpp

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#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
int n,m,k;
int wi[60];
int cnt;
void dfs(int id,int num,int weight)
{
cnt=max(cnt,weight);
if(id==k) return ;
dfs(id+1,num,weight);
if(weight+wi[id]<=m&&num+1<=n) dfs(id+1,num+1,weight+wi[id]);
}
int main()
{
while(scanf("%d%d",&n,&m)==2)
{
scanf("%d",&k);
int tsum;
for(int i=0;i<k;i++)
{
scanf("%d",&wi[i]);
}
sort(wi,wi+k);
tsum=0;
for(int i=k-1;i>=k-n;i--) tsum+=wi[i];
if(wi[0]>m) tsum=0;
if(tsum<=m)
{
printf("%d\n",tsum);
continue;
}
cnt=0;
dfs(0,0,0);
printf("%d\n",cnt);
}
return 0;
}