#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<bitset>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<deque>
#include<list>
#include<iomanip>
#include<cmath>
#include<cstring>
#include<functional>
#include<cstdio>
#include<cstdlib>
#include<numeric>
#include<ctime>
//#include<atcoder/all>
using namespace std;
//using namespace atcoder;

#define repr(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep(i, n) repr(i, 0, n)
#define INF 2e9
//#define MOD 1000000007
#define MOD 998244353
#define LINF (long long)4e18
#define jck 3.141592
#define PI acos(-1.0)

const double EPS = 1e-18;

using ll = long long;
using Pi = pair<int,int>;
using Pl = pair<ll,ll>;
//using mint = modint998244353;

int dh[] = {-1,1,0,0};
int dw[] = {0,0,1,-1};




int main(){
    int n,q; cin >> n >> q;
    int cnt0 = n;
    int cnt1 = 0;
    vector<int> tmp(n);
    rep(i,q){
        int l,r; cin >> l >> r;
        l--; r--;
        repr(j,l,r+1){
            if(tmp[j] == 0){
                tmp[j] = 1;
                cnt0--;
                cnt1++;
            }
            else{
                tmp[j] = 0;
                cnt0++;
                cnt1--;
            }
        }
        cout << cnt1 << endl;
    }
}