Problem: This year Alex has finished school, and now he is a first-year student of Berland State University. For him it was a total surprise that even though he studies programming, he still has to attend physical education lessons. The end of the term is very soon, but, unfortunately, Alex still hasn't attended a single lesson!

Since Alex doesn't want to get expelled, he wants to know the number of working days left until the end of the term, so he can attend physical education lessons during these days. But in BSU calculating the number of working days is a complicated matter:

There are n days left before the end of the term (numbered from 1 to n), and initially all of them are working days. Then the university staff sequentially publishes q orders, one after another. Each order is characterised by three numbers l, r and k:

  * If k = 1, then all days from l to r (inclusive) become non-working days. If some of these days are made working days by some previous order, then these days still become non-working days; 
  * If k = 2, then all days from l to r (inclusive) become working days. If some of these days are made non-working days by some previous order, then these days still become working days. 



Help Alex to determine the number of working days left after each order!

Input

The first line contains one integer n, and the second line — one integer q (1 ≤ n ≤ 109, 1 ≤ q ≤ 3·105) — the number of days left before the end of the term, and the number of orders, respectively.

Then q lines follow, i-th line containing three integers li, ri and ki representing i-th order (1 ≤ li ≤ ri ≤ n, 1 ≤ ki ≤ 2).

Output

Print q integers. i-th of them must be equal to the number of working days left until the end of the term after the first i orders are published.

Example

Input

4
6
1 2 1
3 4 1
2 3 2
1 3 2
2 4 1
1 4 2


Output

2
0
2
3
1
4

Solution (in JAVA):

Solution:
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.TreeMap;
import java.io.BufferedWriter;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;
/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        OutputWriter out = new OutputWriter(outputStream);
        TaskE solver = new TaskE();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskE {
        public void solve(int testNumber, InputReader in, OutputWriter out) {
            int n = in.readInt();
            int q = in.readInt();
            SegmentStorage segments = new SegmentStorage();
            segments.add(0, n - 1);
            for (int query = 0; query < q; query++) {
                int l = in.readInt() - 1;
                int r = in.readInt() - 1;
                int k = in.readInt();
                if (k == 1) {
                    segments.remove(l, r);
                } else if (k == 2) {
                    segments.add(l, r);
                } else throw new RuntimeException();
                out.printLine(segments.getSum());
            }
        }
    }
    static class InputReader {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;
        private InputReader.SpaceCharFilter filter;

        public InputReader(InputStream stream) {
            this.stream = stream;
        }

        public int read() {
            if (numChars == -1) {
                throw new InputMismatchException();
            }
            if (curChar >= numChars) {
                curChar = 0;
                try {
                    numChars = stream.read(buf);
                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (numChars <= 0) {
                    return -1;
                }
            }
            return buf[curChar++];
        }

        public int readInt() {
            int c = read();
            while (isSpaceChar(c)) {
                c = read();
            }
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            int res = 0;
            do {
                if (c < '0' || c > '9') {
                    throw new InputMismatchException();
                }
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }

        public boolean isSpaceChar(int c) {
            if (filter != null) {
                return filter.isSpaceChar(c);
            }
            return isWhitespace(c);
        }

        public static boolean isWhitespace(int c) {
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }

        public interface SpaceCharFilter {
            public boolean isSpaceChar(int ch);
        }
    }
    static class OutputWriter {
        private final PrintWriter writer;

        public OutputWriter(OutputStream outputStream) {
            writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
        }

        public OutputWriter(Writer writer) {
            this.writer = new PrintWriter(writer);
        }

        public void close() {
            writer.close();
        }

        public void printLine(int i) {
            writer.println(i);
        }
    }
    static class SegmentStorage {
        private TreeMap<Integer, Integer> treeMap = new TreeMap<>();
        private int count = 0;

        public void add(int l, int r) {
            Integer left = treeMap.floorKey(l);
            if (left != null && treeMap.get(left) >= l) {
                l = left;
                r = Math.max(r, treeMap.get(left));
                count -= treeMap.get(left) - left + 1;
                treeMap.remove(left);
            }
            while (true) {
                Integer right = treeMap.ceilingKey(l);
                if (right != null && right <= r) {
                    r = Math.max(treeMap.get(right), r);
                    count -= treeMap.get(right) - right + 1;
                    treeMap.remove(right);
                } else break;
            }
            treeMap.put(l, r);
            count += r - l + 1;
        }

        public void remove(int l, int r) {
            while (true) {
                Integer left = treeMap.lowerKey(l);
                if (left != null && treeMap.get(left) >= l) {
                    count -= treeMap.get(left) - left + 1;
                    if (treeMap.get(left) > r) {
                        treeMap.put(r + 1, treeMap.get(left));
                        count += treeMap.get(left) - (r + 1) + 1;
                    }
                    treeMap.put(left, l - 1);
                    count += (l - 1) - left + 1;
                } else break;
            }
            while (true) {
                Integer right = treeMap.ceilingKey(l);
                if (right != null && right <= r) {
                    count -= treeMap.get(right) - right + 1;
                    if (treeMap.get(right) > r) {
                        treeMap.put(r + 1, treeMap.get(right));
                        count += treeMap.get(right) - (r + 1) + 1;
                    }
                    treeMap.remove(right);
                } else break;
            }
        }

        public int getSum() {
            return count;
        }
    }
}