1051B- Relatively Prime Pairs.cpp

#include<bits/stdc++.h>
using namespace std;

//{
#define cel(n,k) ((n-1)/k+1)
#define sets(a) memset(a, -1, sizeof(a))
#define clr(a) memset(a, 0, sizeof(a))
#define max(a,b) ((a)>(b)? (a):(b))
#define min(a,b) ((a)<(b)? (a):(b))
#define fr(n) for(int i=0;i<n;i++)
#define fr1(n) for(int i=1;i<=n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define mp make_pair
#define ff first
#define ss second
#define INF 10000007

typedef long l;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<long long,long long> pll;
//}

ll ls, r;

main(){
    cin>>ls>>r;

    cout<<"YES"<<endl;

    while(ls<r){
        cout<<ls<<" "<<ls+1<<endl;
        ls+=2;
    }
}