flip

#include<iostream>
#include<map>
using namespace std;
map<int,bool> mMap;
int main()
{
    int n,a,b;
    bool k;
    cin>>n;
    for(int i=0;i<n;i++)
    mMap[i]=0;//mMap[i]=0 indicates it as tail.. else 1 for head;
    cin>>n;
    for(int i=0;i<n;i++)
    {
            cin>>k>>a>>b;
            if(k)//k==1 counting heads
            {
                       int count = 0;
                       for(int j=a;j<=b;j++)
                       if(mMap[j])count++;//when mMap[j]=1 count of head increments..
                       cout<<count<<endl;
            }
            else
            {
                for(int j=a;j<=b;j++)//from mMap[a]to mMap[b] fliping the coins..
                mMap[j]=!(mMap[j]);
            }
    }
    return 0;
}