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  • Hdu 1059 Dividing & Zoj 1149 & poj 1014 Dividing(多重背包)


    多重背包模板~

    #include <stdio.h>
    #include <string.h>
    
    int a[7];
    int f[100005];
    int v, k;
    
    void ZeroOnePack(int cost, int weight)
    {
        for (int i = v; i >= cost; i--)
            if (f[i - cost] + weight > f[i])
                f[i] = f[i - cost] + weight;
    }
    void CompletePack(int cost, int weight)
    {
        for (int i = cost; i <= v; i++)
            if (f[i - cost] + weight > f[i])
                f[i] = f[i - cost] + weight;
    }
    void MultiplePack(int cost, int  weight, int amount)
    {
        if (cost * amount >= v) CompletePack(cost, weight);
        else {
            for (int k = 1; k < amount;) {
                ZeroOnePack(k * cost, k * weight);
                amount -= k;
                k <<= 1;
            }
            ZeroOnePack(amount * cost, amount * weight);
        }
    }
    
    int main()
    {
        int sum;
        int cas = 0;
        while (1) {
            sum = 0;
            for (int i = 1; i < 7; i++) {
                scanf("%d", &a[i]);
                sum += a[i] * i;
            }
            if (sum == 0) break;
            if (sum % 2 == 1) {
                printf("Collection #%d:
    Can't be divided.
    
    ", ++cas);
                continue;
            } else {
                v = sum / 2;
                memset(f, 0, sizeof(f));
                for (int i = 1; i < 7; i++)
                    MultiplePack(i, i, a[i]);
                if (f[v] == v)
                    printf("Collection #%d:
    Can be divided.
    
    ", ++cas);
                else
                    printf("Collection #%d:
    Can't be divided.
    
    ", ++cas);
            }
        }
        return 0;
    }
    


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  • 原文地址:https://www.cnblogs.com/james1207/p/3279663.html
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