import std.stdio, std.array, std.string, std.conv, std.algorithm;
import std.typecons, std.range, std.random, std.math, std.container;
import std.numeric, std.bigint, core.bitop;

immutable long MOD = 998244353;

void main() {
    auto s = readln.split.map!(to!int);
    auto N = s[0];
    auto Q = s[1];
    auto A = new int[](N);
    int ans = 0;

    while (Q--) {
        s = readln.split.map!(to!int);
        auto l = s[0] - 1;
        auto r = s[1] - 1;
        foreach (i; l..r+1) {
            A[i] ^= 1;
            if (A[i]) {
                ans += 1;
            } else {
                ans -= 1;
            }
        }
        ans.writeln;
    }
}