问题 Q: 哈夫曼编码

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n = 1, sum = 0;
    int a[1001];
 
    char c[1001];
    while (scanf("%d", &n) != EOF)
    { 
    while (scanf("%d", &n) && n);
    {
        for (int i = 0; i < n; i++)
        {
            scanf("%s%d",&c[i], &a[i]);
        }
        sort(a, a + n);
        int j = 0;
        sum = 0;
        while (j < n - 1)
        {
            sum += a[j] + a[j + 1];
            a[j + 1] = a[j] + a[j + 1];
            j++;
            sort(a + j, a + n);
        }
        if (n > 0)
            printf("%d\n", sum);
    }
    }
    return 0;
}