#include <iostream>
#include <vector>
using namespace std;

int main(){
    int n, q; cin >> n >> q;
    vector<bool> ison(n, false);
    int cnt = 0;
    while(q--){
        int l, r; cin >> l >> r;
        l--; r--;
        for(int i = l; i <= r; i++){
            if(ison[i]) cnt--;
            ison[i] = !ison[i];
            if(ison[i]) cnt++;
        }
        cout << cnt << '\n';
    }
    return 0;
}