using System;
using System.Collections.Generic;
using System.Linq;
using BitArray = System.Collections.BitArray;
using BigInteger = System.Numerics.BigInteger;

namespace AtCoderProject
{
    public class Program
    {
        public object Calc()
        {
            var line = consoleReader.Split.Int;
            var N = line[0];
            var Q = line[1];
            var kojis = consoleReader
                .Repeat(N).SplitInt32
                .SelectMany(Koji.ToKoji)
                .OrderBy(k => k.time)
                .ThenByDescending(k => k.type)
                .ToArray();
            var D = consoleReader.Repeat(Q).Int.ToArray();
            var res = Enumerable.Repeat(-1, Q).ToArray();
            var hikkakaruPoint = new SortedSet<int>();

            var i = 0;
            foreach (var koji in kojis)
            {
                while (i < Q && koji.time > D[i])
                {
                    res[i] = hikkakaruPoint.Min == 0 ? -1 : hikkakaruPoint.Min;
                    ++i;
                }
                if (i >= Q) break;

                if (koji.type == KojiType.Start)
                {
                    hikkakaruPoint.Add(koji.x);
                }
                else
                {
                    hikkakaruPoint.Remove(koji.x);
                }
            }

            return MultiLine(res);
        }

        enum KojiType
        {
            Start,
            End
        }
        struct Koji
        {
            public KojiType type;
            public int time;
            public int x;
            public static Koji[] ToKoji(int[] arr) => new Koji[] {
                new Koji{ type=KojiType.Start, time = arr[0]-arr[2], x= arr[2]},
                new Koji{ type=KojiType.End, time = arr[1]-arr[2], x= arr[2]},
            };
        }

        public const int mod = 1000000007;
        #region いつもの
        private readonly ConsoleReader consoleReader;
        public Program(ConsoleReader consoleReader) { this.consoleReader = consoleReader; }
        static void Main() => Console.WriteLine(new Program(new ConsoleReader()).Calc()); static string MultiLine<T>(IEnumerable<T> source) => string.Join("\n", source);
        #endregion
    }

#pragma warning disable
    public class ConsoleReader { public class SplitLine { string[] splited; public SplitLine(string line) { splited = line.Split(); } public string[] String => splited.ToArray(); public int[] Int => splited.Select(int.Parse).ToArray(); public long[] Long => splited.Select(long.Parse).ToArray(); public ulong[] ULong => splited.Select(ulong.Parse).ToArray(); public double[] Double => splited.Select(double.Parse).ToArray(); } public class RepeatLine { ConsoleReader reader; int num; public RepeatLine(ConsoleReader reader, int num) { this.reader = reader; this.num = num; } public IEnumerable<string> String { get { for (int i = 0; i < num; i++) yield return reader.String; } } public IEnumerable<int> Int { get { for (int i = 0; i < num; i++) yield return reader.Int; } } public IEnumerable<long> Long { get { for (int i = 0; i < num; i++) yield return reader.Long; } } public IEnumerable<string[]> Split { get { for (int i = 0; i < num; i++) yield return reader.Split.String; } } public IEnumerable<int[]> SplitInt32 { get { for (int i = 0; i < num; i++) yield return reader.Split.Int; } } } public virtual string String => Console.ReadLine(); public int Int => int.Parse(String); public long Long => long.Parse(String); public ulong ULong => ulong.Parse(String); public double Double => double.Parse(String); public SplitLine Split => new SplitLine(String); public RepeatLine Repeat(int count) => new RepeatLine(this, count); }
}

Measured memory_bytes: 45080