题目？？？
by LquidKeseLameGG @ 2022-04-30 14:39:39
@[KeseLameGG](/user/722682) P2677
by YIDINGZ @ 2022-04-30 15:03:55
你可以试着换成C语言的输入输出
by 左昊天 @ 2022-04-30 15:04:46
```cpp
#include <iostream>
#include <cstring>
#include <string>
#include <cstdio>
#include <algorithm>
//#define ing long long
using namespace std;
const int maxn=1e6+5;
int n,k,a[maxn],dp[20000005];
int main() {
cin>>n>>k;
int sum=0;
for(int i=1; i<=n; i++) {
cin>>a[i];
sum+=a[i];
}
for(int i=1; i<=n; i++)
for(int j=sum; j>=a[i]; j--)
dp[j]=max(dp[j],dp[j-a[i]]+a[i]);
for(int i=k;i<=sum;i++){
if(dp[i]==i){//如果当前的体积可以放满，说明对应的背包方案存在
cout<<i-k<<endl;
//cout<<i<<" "<<dp[i]<<endl;
break;
}
}
}
```
by LquidKeseLameGG @ 2022-04-30 19:46:34
无超时
by LquidKeseLameGG @ 2022-04-30 19:48:04
@[YIDINGZ](/user/592111) 为啥要for循环？
先选和后选无实质上的区别
```cpp
#include<iostream>
using namespace std;
int n,h[30],b;
int ans=0x7fffffff;
void dfs(int x,int now){
if(x>n){
if(now>=b)ans=min(ans,now);
return;
}
dfs(x+1,now+h[x]);
dfs(x+1,now);
return;
}
int main(){
cin>>n>>b;
for(int i=1;i<=n;i++){
cin>>h[i];
}
dfs(1,0);
cout<<ans-b;
}
```
这是我的搜索，希望能对你有所帮助。
by WannaYellow @ 2022-05-18 17:25:22