#include<bits/stdc++.h>
using namespace std;
namespace my_std{
	#define ll long long
	#define bl bool
	ll my_pow(ll a,ll b,ll mod){
		ll res=1;
		if(!b) return 1;
		while(b){
			if(b&1) res=(res*a)%mod;
			a=(a*a)%mod;
			b>>=1;
		}
		return res;
	}
	ll qpow(ll a,ll b){
		ll res=1;
		if(!b) return 1;
		while(b){
			if(b&1) res*=a;
			a*=a;
			b>>=1;
		}
		return res;
	}
	#define db double
	#define pf printf
	#define pc putchar
	#define fr(i,x,y) for(register ll i=(x);i<=(y);i++)
	#define pfr(i,x,y) for(register ll i=(x);i>=(y);i--)
	#define go(u) for(ll i=head[u];i;i=e[i].nxt)
	#define enter pc('\n')
	#define space pc(' ')
	#define fir first
	#define sec second
	#define MP make_pair
	#define il inline
	#define inf 1e18
	#define random(x) rand()*rand()%(x)
	#define inv(a,mod) my_pow((a),(mod-2),(mod))
	il ll read(){
		ll sum=0,f=1;
		char ch=0;
		while(!isdigit(ch)){
			if(ch=='-') f=-1;
			ch=getchar();
		}
		while(isdigit(ch)){
			sum=sum*10+(ch^48);
			ch=getchar();
		}
		return sum*f;
	}
	il void write(ll x){
		if(x<0){
			x=-x;
			pc('-');
		}
		if(x>9) write(x/10);
		pc(x%10+'0');
	}
	il void writeln(ll x){
		write(x);
		enter;
	}
	il void writesp(ll x){
		write(x);
		space;
	}
}
using namespace my_std;
#define LC lc[x]
#define RC rc[x]
mt19937 rnd(1);
ll n,m,lc[100010],rc[100010],siz[100010],rd[100010],lz[100010],rt=0;
il void pushup(ll x){
	siz[x]=siz[LC]+siz[RC]+1;
}
il void pushdown(ll x){
	if(!lz[x]) return;
	swap(lc[LC],rc[LC]);
	swap(lc[RC],rc[RC]);
	lz[LC]^=1;
	lz[RC]^=1;
	lz[x]=0;
}
void split(ll x,ll &l,ll &r,ll v){
	if(!x){
		l=0;
		r=0;
		return;
	}
	pushdown(x);
	if(siz[LC]>=v){
		r=x;
		split(LC,l,LC,v);
	}
	else{
		l=x;
		split(RC,RC,r,v-siz[LC]-1);
	}
	pushup(x);
}
ll merge(ll x,ll y){
	if(!x) return y;
	if(!y) return x;
	pushdown(x);
	pushdown(y);
	if(rd[x]>=rd[y]){
		RC=merge(RC,y);
		pushup(x);
		return x;
	}
	else{
		lc[y]=merge(x,lc[y]);
		pushup(y);
		return y;
	}
}
void query(ll x){
	if(LC) query(LC);
	writesp(x);
	if(RC) query(RC);
}
int main(){
	n=read();
	m=read();
	fr(i,1,n) siz[i]=1;
	fr(i,1,n) rd[i]=rnd();
	fr(i,1,n) rt=merge(rt,i);
	while(m--){
		ll l=read(),r=read(),x,y,z;
		split(rt,x,z,r);
		split(x,x,y,l-1);
		lz[y]^=1;
		swap(lc[y],rc[y]);
		rt=merge(merge(x,y),z);
	}
	query(rt);
}