#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

    
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); 
ll N,Q;cin>>N>>Q;
ll count=0;
vector<ll> note(N,1);
for(ll i=0;i<Q;i++) {
    ll L,R;cin>>L>>R;
    L--;
    R--;
    for(ll j=L;j<=R;j++) {
        note[j]*=-1;
        if(note[j]==-1) count++;
        else count--;
    }
    cout<<count<<endl;
}
}