#include <bits/stdc++.h>

using namespace std;
#define rep(i, n, o) for(int i = o;i < (n);i++)
#define ou(x) cout << x << endl
#define ll long long
#define re return 0
signed main(){
    int n, q;
    string s;
    cin >> n >> q;
    std::vector<int> v(n, 0);
    int l;
    int r;
    int ans = 0;
    rep(i, q, 0){
        cin >> l >> r;
        rep(j, r, l - 1){
            if(v[j] == 1){
                v[j] = 0;
                ans--;
                continue;
            }
            v[j] = 1;
            if(v[j] == 1){
                ans++;
            }
        }
        ou(ans);
    }
    re;
}