Add Modulo 10.cpp

// https://codeforces.com/contest/1714/problem/E
/*

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*/

#include <bits/stdc++.h>

using namespace std;

#define fi          first
#define se          second
#define pb          push_back
#define mp          make_pair
#define all(x)      x.begin(), x.end()
#define ll          long long
#define pll         pair<ll, ll>
#define vll         vector<long long>
#define vpll        vector<pll>
#define mll         map<ll, ll>
#define sz(x)       ((int) x.size())
#define inf         1e18
#define que_max     priority_queue<ll>
#define que_min     priority_queue <ll, vll, greater<ll>>
#define gcd(a, b)   __gcd(a, b)
#define range(a,b)  substr(a,b-a+1)
#define setbits(x)  __builtin_popcountll(x)
#define zrobits(x)  __builtin_ctzll(x)
#define fori(a, n)  for (ll i = a; i < n; i++)
#define forj(a, n)  for (ll j = a; j < n; j++)
#define fork(a, n)  for (ll k = a; k < n; k++)
#define print(x)    for (auto i : x) cout << i << " "; cout << "\n";
#define print1(x)   for (auto i : x) cout << i.fi << " " << i.se << "\n";
#define FIO         ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
mt19937             rng(chrono::steady_clock::now().time_since_epoch().count());

inline ll power(ll a, ll b)
{
    ll x = 1;
    while (b) {
        if (b & 1)
            x *= a;
        a *= a;
        b >>= 1;
    }
    return x;
}

template <class T>
bool comp(T a, T b) {
    if (a < b)
        return true;
    return false;
}

void solve() {
    ll n, cnt0 = 0, cnt5 = 0, cnt = 0, temp;
    cin >> n;
    set<ll> st;
    fori(0, n) {
        cin >> temp;
        if ((temp % 10) != 0 && (temp % 10) != 5) {
            while (temp % 10 != 2)
                temp = temp + temp % 10;
            st.insert(temp + temp % 10);
        }
        else if ((temp % 10) == 5)
            st.insert(temp + 5);
        else
            st.insert(temp);
        if (temp % 10 == 0)
            cnt0++;
        else if (temp % 10 == 5)
            cnt5++;
        else
            cnt++;
    }
    if ((cnt0 > 0 || cnt5 > 0) && cnt > 0) {
        cout << "No\n";
    }
    else if (cnt == 0) {
        if (st.size() > 1)
            cout << "No\n";
        else
            cout << "Yes\n";
    }
    else {
        vll arr;
        for (auto i : st)
            arr.pb(i);
        fori(0, arr.size()) {
            if ((arr.back() - arr[i]) % 20 != 0) {
                cout << "No\n";
                return;
            }
        }
        cout << "Yes\n";
        return;
    }
}

int32_t main()
{
    FIO;

    #ifndef ONLINE_JUDGE
    //remove this piece of code when this has to be submitted in kickstart, coding ninjas
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    //freopen is used to associate a file with stdin or stdout stream in C++
    #endif

    clock_t z = clock();

    ll t = 1;
    cin >> t;
    while (t--) {
        solve();
    }

    cerr << "Run Time: " << ((double)(clock() - z) / CLOCKS_PER_SEC) << "\n";

    return 0;
}