HDU 1059 Dividing(多重背包)

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <string>
#include <map>
#include <vector>
#include <set>
#include <queue>
#include <stack>
#include <cctype>
using namespace std;
typedef long long LL;
typedef unsigned long long ULL;
#define MAXN 10+10
#define INF (1<<30)
#define mod 123456789
int main (){
    int a[MAXN] = {0};
    int kase = 0;
    while(true){
        int sum = 0;
        for(int i = 1; i <= 6; i++){
            scanf("%d",&a[i]);
            sum += a[i]*i;
        }
        if(!sum)
            break;
        printf("Collection #%d:\n",++kase);
        if(sum & 1){
            printf("Can't be divided.\n\n");
            continue;
        }
        int d[60000+10] = {0};
        sum /= 2;
        for(int i = 1; i <= 6; i++){
            if(a[i]*i >= sum){
                for(int j = i; j <= sum; j++){
                    if((j-i > 0 && d[j-i]) || j-i == 0)
                        d[j] = 1;
                }
            }
            else if(a[i]){
                int k = a[i]/2;
                k /= 2;
                int j;
                for(j = 1; j <= k; j=(j<<1)){
                    for(int z = sum; z >= j*i; z--){
                        if((z-i*j > 0 && d[z-i*j]) || z-i*j == 0)
                            d[z] = 1;
                    }
                }
                int x = a[i]+1-j;
                for(int z = sum; z >= i*x; z--){
                    if((z-i*x > 0 && d[z-i*x]) || z-i*x == 0)
                        d[z] = 1;
                }
            }
        }
        if(d[sum])
            printf("Can be divided.\n");
        else
            printf("Can't be divided.\n");
        printf("\n");
    }
    return 0;
}