Problem:
Score : 500 points

Problem Statement

There is an infinitely long street that runs west to east, which we consider as a number line.

There are N roadworks scheduled on this street.
The i-th roadwork blocks the point at coordinate X_i from time S_i - 0.5 to time T_i - 0.5.

Q people are standing at coordinate 0. The i-th person will start the coordinate 0 at time D_i, continue to walk with speed 1 in the positive direction and stop walking when reaching a blocked point.

Find the distance each of the Q people will walk.

Constraints

All values in input are integers.

1 \leq N, Q \leq 2 \times 10^5

0 \leq S_i < T_i \leq 10^9

1 \leq X_i \leq 10^9

0 \leq D_1 < D_2 < ... < D_Q \leq 10^9

If i \neq j and X_i = X_j, the intervals [S_i, T_i) and [S_j, T_j) do not overlap.

Input

Input is given from Standard Input in the following format:

N Q
S_1 T_1 X_1
:
S_N T_N X_N
D_1
:
D_Q

Output

Print Q lines. The i-th line should contain the distance the i-th person will walk or -1 if that person walks forever.

Sample Input 1

4 6
1 3 2
7 13 10
18 20 13
3 4 2
0
1
2
3
5
8

Sample Output 1

2
2
10
-1
13
-1

The first person starts coordinate 0 at time 0 and stops walking at coordinate 2 when reaching a point blocked by the first roadwork at time 2.

The second person starts coordinate 0 at time 1 and reaches coordinate 2 at time 3. The first roadwork has ended, but the fourth roadwork has begun, so this person also stops walking at coordinate 2.

The fourth and sixth persons encounter no roadworks while walking, so they walk forever. The output for these cases is -1.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.io.*;
import java.util.*;
import java.util.Map.Entry;
import java.util.stream.Collectors;

@SuppressWarnings("unused")
public class Main {
	
	//final boolean isDebug = true;
	final boolean isDebug = false;
	String fileName = "input.txt";
	FastScanner sc;
	PrintWriter out;
	final int MOD = (int)1e9+7;
	//final int INF = Integer.MAX_VALUE / 2;
	final long INF = Long.MAX_VALUE / 2;
	
	void solve() throws Exception{
		int N = sc.nextInt();
		int Q = sc.nextInt();
		TreeSet<Integer> set = new TreeSet<>();
		
		Pair[] list = new Pair[N];
		int[] S = new int[N], T = new int[N], X = new int[N];
		for(int i = 0; i < N; i++){
			S[i] = sc.nextInt(); T[i] = sc.nextInt()-1;
			X[i] = sc.nextInt();
			set.add(S[i]-X[i]); set.add(T[i]-X[i]);
		}
		
		int[] D = new int[Q];
		for(int i = 0; i < Q; i++){
			D[i] = sc.nextInt();
			set.add(D[i]);
		}
		
		HashMap<Integer, Integer> map = new HashMap<>();
		for(int i = 0; !set.isEmpty(); i++) map.put(set.pollFirst(), i);
		
		DualSegmentTree seg = new DualSegmentTree(map.size());
		for(int i = 0; i < N; i++) seg.setSegment2(map.get(S[i] - X[i]), map.get(T[i] - X[i])+1, X[i]);
		
		for(int i = 0; i < Q; i++){
			long x = seg.getPoint(map.get(D[i]));
			if(x != Long.MAX_VALUE) System.out.println(x);
			else System.out.println(-1);
		}
	}
	
	/* end solve */
	
	/* main */
	public static void main(String[] args) throws Exception {
		new Main().m();
	}
	
	void m() throws Exception {
		long S = System.currentTimeMillis();
		sc = (isDebug) ? new FastScanner(new FileInputStream(fileName)) : new FastScanner(System.in);
		out = new PrintWriter(System.out);
		solve();
		out.flush();
		long G = System.currentTimeMillis();
		if(isDebug){
			System.out.println("---Debug---");
			System.out.printf("%8d ms\n", (G-S));
		}
	}
	
	/* end main */
}
/* end Main */

class Pair{
	int S, T;
	int X;
	public Pair(int s, int t, int x){
		S = s; T = t; X = x;
	}
}

class DualSegmentTree{
	int n;
	long[] node;
	
	/*作用素で使える単位元*/
	private long e = Long.MAX_VALUE;
	
	/*結合律が成り立ち、更新が可換であるような、各要素への作用素*/
	private long f(long nodeVal, long val){
		return Math.min(nodeVal, val); //区間最小値更新
	}
	
	/* 元配列vでセグメント木を初期化 */
	public DualSegmentTree(long[] v){
		n = 1;
		while(n < v.length) n *= 2;
		node = new long[2*n];
		Arrays.fill(node, e);
		
		for(int i = 0; i < v.length; i++)
			node[i+n] = v[i];
		
		for(int i = n-1; i > 0; i--)
			node[i] = f(node[2*i+0], node[2*i+1]);
	}
	
	/* 単位元で初期化 */
	public DualSegmentTree(int sz){
		n = 1;
		while(n < sz) n *= 2;
		node = new long[2*n];
		Arrays.fill(node, e);
	}
	
	/* 0-indexed:xの要素を取得する */
	public long getPoint(int x){
		x += n;
		long res = node[x];
		while(x > 1){
			x = x / 2;
			res = f(res, node[x]);
		}
		return res;
	}
	
	/* 指定した区間[a,b)に含まれるすべての要素に作用素を適用するクエリ */
	public void setSegment(int a, int b, long val){
		setSegment(a, b, val, 1, 0, n);
	}
	
	public void setSegment2(int a, int b, long val){
		a += n;
		b += n;
		while (a < b) {
			if (a != 0){
				node[a] = f(node[a], val);
				a++;
			}
			if (b != 0){
				--b;
				node[b] = f(node[b], val);
			}
			a >>= 1;
			b >>= 1;
		}
	}
	
	private void setSegment(int a, int b, long val, int k, int l, int r){
		if(r <= a || b <= l) return;
		if(a <= l && r <= b){
			node[k] = f(node[k], val);
			return;
		}
		setSegment(a, b, val, 2*k+0, l, (l+r)/2);
		setSegment(a, b, val, 2*k+1, (l+r)/2, r);
	}
}

class FastScanner {
    private InputStream in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    public FastScanner(InputStream in) {
		this.in = in;
	}
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() {
    	if (hasNextByte()) return buffer[ptr++];
    	else return -1;
    }
    private static boolean isPrintableChar(int c){
    	return 33 <= c && c <= 126;
    }
    public boolean hasNext() {
    	while(hasNextByte() && !isPrintableChar(buffer[ptr]))
    		ptr++; return hasNextByte();
    }
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public String nextLine() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(b != 10) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() {
    	return Double.parseDouble(next());
    }
}