Submission #72681290

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

using LL = long long;

#define int long long

const int N = 2e5 + 1;
const int M = 998244353;

void solve()
{
    int q;
    cin >> q;
    int ok = 0;
    int res = 0;
    while (q--)
    {
        int a;
        cin >> a;

        if (a == 1)
        {
            res++;
            // continue;
        }
        else if (a == 2)
        {
            if (res >= 1)
                res--;
            // continue;
        }
        else
        {
            ok = ok xor 1;
        }
        if (ok and res >= 3)
        {
            cout << "Yes\n";
        }
        else
        {
            cout << "No\n";
        }
    }
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T = 1;
    //   cin >> T;

    while (T--)
        solve();

    return 0;
}

Submission Info

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