HDU 1171 Big Event in HDU

http://acm.hdu.edu.cn/showproblem.php?pid=1171

这题是1085的通用版本，这个模板可同用于任意面值，任意数量的硬币和

#include<stdio.h>
int c1[250010], c2[250010];
int v[55];
int m[55];
int main()
{
    int n,i,j,k,sum,len;
    while(scanf("%d", &n),n>0)
    {
        memset(v, 0, sizeof(v));
        memset(m, 0, sizeof(m));
        memset(c1, 0, sizeof(c1));
        memset(c2, 0, sizeof(c2));
        for(sum=0,i=1; i<=n; ++i)
        {
            scanf("%d %d", &v[i], &m[i]);
            sum += v[i]*m[i];
        }
        for(i=0; i<=v[1]*m[1]; i+=v[1])
            c1[i] = 1;
        len = v[1]*m[1];
        for(i=2; i<=n; ++i)
        {
            for(j=0; j<=len; ++j)
                for(k=0; k<=v[i]*m[i]; k+=v
                [i])
                {
                    c2[k+j] += c1[j];
                }
            len += v[i]*m[i];
            for(j=0; j<=len; ++j)
            {
                c1[j] = c2[j];
                c2[j] = 0;
            }
        }
        for(i= sum/2; i>=0; --i)
            if(c1[i] != 0)
            {
                printf("%d %d\n", sum-i, i);
                break;
            }
    }
    return 0;
}