比例混合：
sa, sb, sc分别表示x, y, z 饲料配置总份数
sa = k * x, sb = k * y, sc = k * z;
求k可以相加 $k = \frac {(sa + sb + sc)} {(x + y + z)} $

#include <iostream>

using namespace std;

int main()
{
    int g[3];
    for (int i = 0; i < 3; i ++) cin >> g[i];

    if (g[0] + g[1] + g[2] == 0) puts("0 0 0 0");
    else
    {

        int a[3][3];
        for (int i = 0; i < 3; i ++)
            for (int j = 0; j < 3; j ++)
                cin >> a[i][j];

        int res = 301, r[4];

        for (int x = 0; x <= 100; x ++)
            for (int y = 0; y <= 100; y ++)
                for (int z = 0; z <= 100; z ++)
                {
                    if (x + y + z == 0) continue;
                    int sa = x * a[0][0] + y * a[1][0] + z * a[2][0];
                    int sb = x * a[0][1] + y * a[1][1] + z * a[2][1];
                    int sc = x * a[0][2] + y * a[1][2] + z * a[2][2];

                    int k = (sa + sb + sc) / (g[0] + g[1] + g[2]);
                    if (g[0] * k == sa && g[1] * k == sb && g[2] * k == sc)
                    {
                        if (x + y + z < res)
                        {
                            res = x + y + z;
                            r[0] = x, r[1] = y, r[2] = z, r[3] = k;
                        }
                    }
                }

        if (res <= 300)
            for (int i = 0; i < 4; i ++) cout << r[i] << ' ';    
        else puts("NONE");
    }
    return 0;
}