Codeforces 977D 题解报告

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
int count3(LL x)
{
    int ret = 0;
    while(x % 3 == 0)
    {
        ret++;
        x /= 3;
    }
    return ret;
}
int main()
{
    int n;
    cin >> n;
    vector<pair<int, LL>> v(n);
    for(int i = 0; i < n; i++)
    {
        cin >> v[i].second;
        v[i].first = -count3(v[i].second);
    }
    sort(v.begin(), v.end());
    for(int i = 0; i < n; i++)
    {
        printf("%I64d%c", v[i].second, " \n"[i + 1 == n]);
    }
}