#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)

int p[100010];

signed main(){
  int ans=0;
  int n,q;cin>>n>>q;
  rep(qq,q){
    int l;
    int r;
    cin>>l>>r;
    l--;r--;
    int oncount=0;
    int offcount=0;
    for(int i=l;i<=r;i++){
      if(p[i]==0){
        p[i]=1;
        offcount++;
        continue;
      }
      if(p[i]==1){
        p[i]=0;
        oncount++;
      }
    }
    ans=ans+offcount-oncount;
    //cout<<p[0]<<p[1]<<p[2]<<p[3]<<p[4]<<endl;
    cout<<ans<<endl;
  }
  return 0;
}