P1090 [NOIP2004 提高组] 合并果子

知识点：贪心，霍夫曼编码，优先队列

#include 

#define fi first
#define se second
#define pb push_back
#define mk make_pair
#define sz(x) ((int) (x).size())
#define all(x) (x).begin(), (x).end()

using namespace std;

typedef long long ll;
typedef vector vi;
typedef pair pa;

int main() {
    int n;
    while (cin >> n && n) {
        priority_queue > q;
        for (int i = 0; i < n; i++) { int x; cin >> x; q.push(x); }
        ll ans = 0;
        for (int i = 1; i < n; i++) {
            int a = q.top(); q.pop();
            int b = q.top(); q.pop();
            q.push(a + b);
            ans += a + b;
        }
        cout << ans << endl;
    }
    return 0;
}