Go: ///
// File:  0529.go
// Author: ymiyamoto
//
// Created on Wed Feb 28 20:39:28 2018
//
package main

import (
	"fmt"
	"sort"
)

func max(n, m int64) int64 {
	if n < m {
		return m
	} else {
		return n
	}
}

func main() {
	for {
		var N int
		var M int64
		fmt.Scan(&N, &M)
		if N == 0 && M == 0 {
			break
		}

		arr := make([]int64, N+1)
		for i := 1; i <= N; i++ {
			fmt.Scan(&arr[i])
		}
		sort.Slice(arr, func(i, j int) bool { return arr[i] < arr[j] })

		sums := make([]int64, len(arr)*len(arr))
		for i := 0; i < len(arr); i++ {
			for j := 0; j < len(arr); j++ {
				sums[i*len(arr)+j] = arr[i] + arr[j]
			}
		}

		sort.Slice(sums, func(i, j int) bool { return sums[i] < sums[j] })

		var m int64 = 0
		for i := 0; i < len(sums); i++ {
			rem := M - sums[i]
			if rem >= 0 {
				index := sort.Search(len(sums), func(i int) bool { return sums[i] > rem }) - 1
				if index >= 0 {
					m = max(m, sums[i]+sums[index])
				}
			}
		}
		fmt.Println(m)
	}
}

C++: //include----------------------------------------------------------------------------------------------------------------------
#include <bits/stdc++.h>
//using namespace--------------------------------------------------------------------------------------------------------------
using namespace std;

//define-----------------------------------------------------------------------------------------------------------------------
#define rep(i, n) for(int i = 0; i < (int)n; i++)
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define CLR(a) memset((a), 0 ,sizeof(a))
#define dump(x) cout << #x << " = " << (x) << "\n";
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)

//typedef----------------------------------------------------------------------------------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef priority_queue<int> maxpq;
typedef priority_queue< int, vector<int>, greater<int> > minpq;
//const------------------------------------------------------------------------------------------------------------------------
static const double EPS = 1e-10;
static const double PI = acos( -1.0 );
static const int mod = 1000000007;
static const int INF = 1 << 25;
static const LL LL_INF = 1152921504606846976;
//global-----------------------------------------------------------------------------------------------------------------------
LL n, m, ans = 0;
VLL a;
//#define DEBUG
//function-------------------------------------------------------------------------------------------------------------------
int main() {
	while ( scanf( "%lld %lld", &n, &m ) && n && m ) {
		a.resize( n );
		rep( i, n ) {
			scanf( "%lld", &a[ i ] );
		}
		ans = 0;
		sort( a.rbegin(), a.rend() );
		rep( i, n ) {
			ans += ( ( m - ans ) / a[ i ] )  * a[ i ];
		}
		printf( "%lld\n", ans );
	}
	return 0;
}

C++: #include <iostream>
#include <stdlib.h>
using namespace std;
 
int main() {
	for(;;){
		/*入力*/
		int N,M,count=0;
		cin >> N >> M;
		if(N==0 && M==0)exit(0);
		int P[N+1],array[M+1]={0};
		P[0]=0;
		for(int i=1;i<=N;i++)cin >> P[i];
		for(int i=0;i<=N;i++)array[P[i]]=1;
 
		/*２投(０投１投を含む)で1からMまでが可能か判定*/
		for(int i=0;i<=N;i++){
			for(int j=0;j<=N;j++){
				if(P[i]+P[j] <= M)array[P[i]+P[j]]=1;
			}
		}
 
		/*４投に拡張*/
		for(int i=0;i<=M;i++){
			if(array[i]==1)count++;
		}
		int k=0,p[count];
		for(int i=0;i<=M;i++){
			if(array[i]==1){
				p[k]=i;
				k++;
			}
		}
		for(int i=0;i<count;i++){
			for(int j=0;j<count;j++){
				if(p[i]+p[j] <= M)array[p[i]+p[j]]=1;
			}
		}
 
		/*判定出力*/
		for(int i=M;i>0;i--){
			if(array[i]==1){
				cout << i << endl;
				break;
			}
		}
	}
	return 0;
}

C++: //http://judge.u-aizu.ac.jp/onlinejudge/review.jsp?rid=2676345#1
//http://judge.u-aizu.ac.jp/onlinejudge/review.jsp?rid=2676345#1
#include <iostream>
#include<cstdlib>
#include<queue>
#include<set>
#include<vector>
#include<string>
#include<algorithm>
#include<stack>
#include<map>
#include<cstdio>
#include<fstream>
#include<cstring>
using namespace std;
#define rep(i,a) for(int i=0;i<a;i++)
#define mp make_pair
#define P pair<int,int>
#define ll __int64

ll n,m;
ll t[10000];
const int MA=1000000;
ll s1[MA];
ll s2[MA];


int main(){

while(cin>>n>>m,n||m){
rep(i,MA)s1[i]=s2[i]=0;
rep(i,10000)t[i]=0;

for(int i=1;i<=n;i++)cin>>t[i];
int g=0;

for(int i=0;i<=n;i++){
	for(int j=0;j<=n;j++){
		s1[i*(n+1)+j]=t[i]+t[j];
		g++;
	}
}


sort(s1,s1+g);
rep(i,g)s2[i]=s1[i];

int ans=0;

for(int i=0;i<g;i++){
	int now=s1[i];

	int l=0;
	int r=g-1;
	int mid=(l+r)/2;
	int x=s2[mid];

	for(int i=0;i<70;i++){
		if(x+now==m)break;
		if(l>r)break;
		if(x+now>m){
			r=mid;
			mid=(r+l)/2;
			x=s2[mid];
		}
		else{
			l=mid;
			mid=(r+l)/2;
			x=s2[mid];
		}
	}

	//cout<<" "<<x<<" "<<now<<" "<<x+now<<endl;
	if(x+now<=m)
	ans=max(ans,x+now);
}
cout<<ans<<endl;
}
	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(void){
	while(1){
		int n,m; cin >> n >> m;
		if(n==0 && m==0) return 0;
		vector<int> p(n);
		for(int i=0;i<n;i++) cin >> p[i];
		p.push_back(0);
		vector<int> pp((n+1)*(n+1));
		int cnt = 0;
		for(int i=0;i<n+1;i++){
			for(int j=0;j<n+1;j++){
				pp[cnt]=p[i]+p[j];
				cnt++;
			}
		}
		sort(pp.begin(),pp.end());
		int ans = 0;
		for(int i=0;i<(n+1)*(n+1);i++){
			int tmp = pp[i];
			int aim = m-tmp;
			if(aim < 0) continue;
			tmp+=*(upper_bound(pp.begin(),pp.end(),aim)-1);
			if(tmp <= m ) ans = max(ans,tmp);
		}
		printf("%d\n",ans);
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <functional>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define MP make_pair

typedef vector<int> vi;

int n, m;
int score[1001];
vi v;

int main() {
	cin >> n >> m;
	REP(i, n) scanf("%d", &score[i]);
	score[n++] = 0;

	REP(i, n) FOR(j, i, n) v.push_back(score[i] + score[j]);
	sort(v.begin(), v.end(), greater<int>());

	int ans = 0;
	REP(i, n) FOR(j, i, n) {
		vi::iterator it = upper_bound(v.begin(), v.end(), m - score[i] - score[j], greater<int>());
		if (it == v.end()) continue;
		ans = max(ans, *it + score[i] + score[j]);
	}

	cout << ans << endl;
	return 0;
}