1560A. Dislike of Threes.cpp

#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;
using str = string;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define mp make_pair

using vi = vector<int>;
using vl = vector<ll>;
using vd = vector<ld>;
using vs = vector<str>;
using vc = vector<char>;
using vb = vector<bool>;

#define sz(x) int((x).size())
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pb push_back
#define eb emplace_back

const int mod = 1e9 + 7; // 998244353;

#define nl '\n'
#define yes cout << "YES\n"
#define no cout << "NO\n"

void solve()
{
    int n;
    cin >> n;

    int cur = 1;
    while (true)
    {
        if (cur % 3 == 0 or cur % 10 == 3)
        {
            cur++;
            continue;
        }
        if (--n == 0)
        {
            cout << cur << '\n';
            break;
        }
        cur++;
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int tc = 1;
    cin >> tc;

    while (tc--)
        solve();
}