Exemple #1
0
    static void Main()
    {
        Console.SetOut(new System.IO.StreamWriter(Console.OpenStandardOutput())
        {
            AutoFlush = false
        });
        var h = Read();
        var n = h[0];
        var a = Read();

        var st = new BIT(n);

        for (int i = 0; i < n; i++)
        {
            st.Add(i + 1, a[i]);
        }

        for (int k = 0; k < h[1]; k++)
        {
            var q = Read();
            if (q[0] == 0)
            {
                st.Add(q[1] + 1, q[2]);
            }
            else
            {
                Console.WriteLine(st.Sum(q[1] + 1, q[2] + 1));
            }
        }
        Console.Out.Flush();
    }
Exemple #2
0
    // i 以下のインデックスのうち、交換回数が k 以下となる最小値
    static int[] GetLeft(int n, long k, int[] a)
    {
        var left = new int[n];
        var bit  = new BIT(n);
        var inv  = 0L;
        var ui   = new bool[n];
        var uj   = new bool[n];

        var q = TwoPointers(n, n, (i, j) =>
        {
            if (!uj[j] && j > 0)
            {
                inv -= bit.Sum(1, a[j - 1]);
                bit.Add(a[j - 1], -1);
            }

            if (!ui[i])
            {
                inv += bit.Sum(a[i] + 1, n + 1);
                bit.Add(a[i], 1);
            }

            ui[i] = uj[j] = true;
            return(inv <= k);
        });

        foreach (var(i, j) in q)
        {
            left[i] = j;
        }

        return(left);
    }
Exemple #3
0
    static object Solve()
    {
        var n = int.Parse(Console.ReadLine());
        var a = Read();

        var map = new CompressionHashMap(a);
        var m   = map.Count;

        var dpu = new BIT(m);
        var dpd = new BIT(m);

        foreach (var v in a)
        {
            var i = map[v] + 1;

            dpu.Add(i, dpd.Sum(i - 1));
            dpd.Add(i, dpu.Sum(i + 1, m + 1));

            dpu.Add(i, 1);
            dpd.Add(i, 1);

            dpu[i] %= M;
            dpd[i] %= M;
        }

        return((dpu.Sum(m) + dpd.Sum(m) - 2 * n + M) % M);
    }
Exemple #4
0
    public void Solve()
    {
        for (int i = 0; i < N; i++)
        {
            A[i] -= K;
        }
        long[] sum = new long[N + 1];
        for (int i = 0; i < N; i++)
        {
            sum[i + 1] = sum[i] + A[i];
        }
        long Inf = (long)1e18;

        HashSet <long> H = new HashSet <long>();

        H.Add(-Inf);
        H.Add(Inf);
        H.Add(0);
        foreach (var v in sum)
        {
            H.Add(v);
        }
        var L = H.ToList();

        L.Sort();
        var dic = new Dictionary <long, int>();

        for (int i = 0; i < L.Count; i++)
        {
            dic.Add(L[i], i);
        }

        int NN = N * 2;
        var BT = new BIT(NN);

        for (int i = 1; i <= N; i++)
        {
            BT.Add(dic[sum[i]] + 1, 1);
        }

        long ans = 0;

        ans += N - BT.Sum(dic[L[dic[0]]]);
        BT.Add(dic[sum[1]] + 1, -1);
        BT.Add(dic[-Inf] + 1, 1);
        for (int i = 1; i < N; i++)
        {
            ans += N - BT.Sum(dic[L[dic[sum[i]]]]);
            BT.Add(dic[sum[i + 1]] + 1, -1);
            BT.Add(dic[-Inf] + 1, 1);
        }

        Console.WriteLine(ans);
    }
Exemple #5
0
    static void Main()
    {
        var(n, qc) = Read2();
        var qs = Array.ConvertAll(new bool[qc], _ => Read());

        var bit = new BIT(n);

        Console.SetOut(new System.IO.StreamWriter(Console.OpenStandardOutput())
        {
            AutoFlush = false
        });
        foreach (var q in qs)
        {
            var k = q[1];

            if (q[0] == 1)
            {
                var v = bit.Sum(k <= n ? n - k + 1 : k - n, n + 1);
                Console.WriteLine(v % 2 == 0 ? k : 2 * n - k + 1);
            }
            else
            {
                bit.Add(k, 1);
            }
        }
        Console.Out.Flush();
    }
Exemple #6
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    static object Solve()
    {
        var n = int.Parse(Console.ReadLine());
        var a = Read();

        var p2  = MPows(2, n);
        var p2_ = MPows(MHalf, n);

        var map = new CompressionHashMap(a);
        var bit = new BIT(map.Count);

        var r = 0L;

        for (int i = 0; i < n; i++)
        {
            var v = map[a[i]] + 1;

            r += bit.Sum(v) % M * p2_[n - i];
            r %= M;

            bit.Add(v, p2[n - 1 - i]);
        }

        return(r);
    }
Exemple #7
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    public void Solve()
    {
        var h = new HashSet <long>();

        h.Add(0);
        for (int i = 0; i < N; i++)
        {
            h.Add(A[i]);
        }
        var l = h.ToList();

        l.Sort();
        var dic = new Dictionary <long, int>();

        for (int i = 0; i < l.Count; i++)
        {
            dic.Add(l[i], i);
        }


        long       max = 0;
        List <int> pos = new List <int>();

        for (int i = 0; i < N; i++)
        {
            if (max < A[i])
            {
                pos.Add(i);
                max = A[i];
            }
        }

        var cntBT = new BIT(N);
        var totBT = new BIT(N);

        for (int i = 0; i < N; i++)
        {
            cntBT.Add(dic[A[i]] + 1, 1);
            totBT.Add(dic[A[i]] + 1, A[i]);
        }

        long total = A.Sum();
        long done  = 0;

        long[] ans = new long[N];
        for (int i = pos.Count - 1; i > 0; i--)
        {
            long del = (total - totBT.Sum(dic[A[pos[i - 1]]])) - A[pos[i - 1]] * (N - cntBT.Sum(dic[A[pos[i - 1]]]));
            ans[pos[i]] = del - done;
            done        = del;
        }
        ans[0] = total - done;
        Console.WriteLine(String.Join("\n", ans));
    }
Exemple #8
0
    public static long InversionNumber(int n, int[] a)
    {
        var r   = 0L;
        var bit = new BIT(n);

        for (int i = 0; i < n; ++i)
        {
            r += i - bit.Sum(a[i]);
            bit.Add(a[i], 1);
        }
        return(r);
    }
Exemple #9
0
    public static long Inversion(int[] s)
    {
        var ans = 0L;
        var bit = new BIT(s.Length);

        for (var j = 0; j < s.Length; j++)
        {
            ans += j - bit.Sum(s[j]);
            bit.Add(s[j], 1);
        }
        return(ans);
    }
Exemple #10
0
    static void Main()
    {
        var n = int.Parse(Console.ReadLine());
        var a = Console.ReadLine().Split().Select(int.Parse).Select((x, i) => new { x, i }).OrderBy(_ => _.x).ToArray();

        var st = new BIT(n);
        var r  = 0L;

        for (int i = 0; i < n; i++)
        {
            r += st.Sum(a[i].i + 1, n + 1);
            st.Add(a[i].i + 1, 1);
        }
        Console.WriteLine(r);
    }
Exemple #11
0
    static void Main()
    {
        var k = int.Parse(Console.ReadLine());
        var a = new int[k].Select(_ => { Console.ReadLine(); return(Read()); }).ToArray();

        Console.ReadLine();
        var b = Read();

        var t   = a.Select(ai => Tally(ai, 20)).ToArray();
        var inv = a.Select(ai =>
        {
            var sum = 0L;
            var bit = new BIT(20);
            foreach (var x in ai)
            {
                sum += bit.Sum(x + 1, 21);
                bit.Add(x, 1);
            }
            return(sum);
        }).ToArray();

        var st = new BIT(20);
        var r  = 0L;

        foreach (var bi in b)
        {
            for (int x = 1; x <= 20; x++)
            {
                r = (r + st.Sum(x + 1, 21) * t[bi - 1][x]) % M;
            }
            r = (r + inv[bi - 1]) % M;

            for (int x = 1; x <= 20; x++)
            {
                st.Add(x, t[bi - 1][x]);
            }
        }

        Console.WriteLine(r);
    }
Exemple #12
0
    public void Solve()
    {
        int N    = S.Length;
        int M    = T.Length;
        var BTSA = new BIT(N);
        var BTSB = new BIT(N);
        var BTTA = new BIT(N);
        var BTTB = new BIT(N);

        for (int i = 0; i < N; i++)
        {
            if (S[i] == 'A')
            {
                BTSA.Add(i + 1, 1);
            }
            if (S[i] == 'B')
            {
                BTSB.Add(i + 1, 1);
            }
        }
        for (int i = 0; i < M; i++)
        {
            if (T[i] == 'A')
            {
                BTTA.Add(i + 1, 1);
            }
            if (T[i] == 'B')
            {
                BTTB.Add(i + 1, 1);
            }
        }

        int[][] jud = new int[3][];
        jud[0] = new int[] { 0, -1, 1 };
        jud[1] = new int[] { 1, 0, -1 };
        jud[2] = new int[] { -1, 1, 0 };


        var sbd = new StringBuilder();

        for (int q = 0; q < Q; q++)
        {
            int a  = Query[q][0];
            int b  = Query[q][1];
            int c  = Query[q][2];
            int d  = Query[q][3];
            int sa = BTSA.Sum(b) - BTSA.Sum(a - 1);
            int sb = BTSB.Sum(b) - BTSB.Sum(a - 1);
            int ta = BTTA.Sum(d) - BTTA.Sum(c - 1);
            int tb = BTTB.Sum(d) - BTTB.Sum(c - 1);

            sa %= 3;
            sb %= 3;
            ta %= 3;
            tb %= 3;

            if (jud[sa][sb] == jud[ta][tb])
            {
                sbd.AppendLine("YES");
            }
            else
            {
                sbd.AppendLine("NO");
            }
        }
        Console.Write(sbd.ToString());
    }