Esempi in C# (CSharp) per BinaryIndexedTree.Concat

Esempio n. 1

    static void Solve(IO io)
    {
        var kMax = 200000;
        var bit  = new BinaryIndexedTree <int>(kMax + 1, Group <int> .GetSumGroup());

        var q = io.I;

        for (var i = 0; i < q; i++)
        {
            var t = io.C;
            var x = io.I;

            if (t == '2')
            {
                var ok = kMax;
                var ng = -1;

                while (Abs(ok - ng) > 1)
                {
                    var mid = (ok + ng) / 2;
                    if (bit.Concat(mid) >= x)
                    {
                        ok = mid;
                    }
                    else
                    {
                        ng = mid;
                    }
                }

                io.Write(ok);
                bit[ok] = 0;
            }
            else
            {
                bit[x] = 1;
            }
        }
    }