#include<fstream.h>

#define InFile "hotel.in"
#define OutFile "hotel.out"

long n,p;

void citire()
{ ifstream f(InFile);
  f>>n>>p;
  int i=1,a[30000],j,x,ii,ff,k=0,kmax=0;
  memset(a,0,sizeof(a));
  ofstream g(OutFile);
  while(i<=p)
    { f>>x;
      if(x==1)
	  { f>>ii>>ff;
	    for(j=ii;j<ii+ff;j++)
		a[j]=1;
	    k=0;
	    for(j=1;j<=n;j++)
		    if(a[j]==0) k++;
		    else{ if(k>kmax) kmax=k;
			  k=0;
			}
	     if(i!=p)
		 if(k<kmax) g<<kmax<<"\n";
		 else g<<k<<"\n";
		 else if(k<kmax) g<<kmax;
		      else g<<k;

	  }
      else if(x==2)
	      { f>>ii>>ff;
		for(j=ii;j<=ii+ff;j++)
		   a[j]=0;
		k=0;
		 for(j=1;j<=n;j++)
		    if(a[j]==0) k++;
		    else{ if(k>kmax) kmax=k;
			  k=0;
			}
		if(i!=p)
		if(k<kmax) g<<kmax<<"\n";
		else g<<k<<"\n";
		else if(k<kmax) g<<kmax;
		     else g<<k;

	      }
	  else { k=0;
		 for(j=1;j<=n;j++)
		    if(a[j]==0) k++;
		    else{ if(k>kmax) kmax=k;
			  k=0;
			}
		 if(i!=p)
		 if(k<kmax) g<<kmax<<"\n";
		 else g<<k<<"\n";
		 else if(k<kmax) g<<kmax;
		      else g<<k;

	       }
       i++;
      }
  g.close();
  f.close();
}
int main()
{ citire();
  return 0;
}