func_code_string: #include <bits/stdc++.h>   using namespace std;   void File() {     freopen( output.txt ,  w , stdout);     freopen( input.txt ,  r , stdin);   }   void yAsEr_HaFiz() {     ios::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);   }   int dx[] = {0, 0, 1, -1, 1, -1, 1, -1};   int dy[] = {1, -1, 0, 0, -1, 1, 1, -1};   int const N = 2e5 + 9, MOD = 1e9 + 7, oo = 1e9 + 7;   long long n, m, a, n1, n2;   int main() {     long long l, r;     cin >> l >> r;     cout <<  YES  <<   n ;     for (long long i = l; i <= r; i += 2) cout << i <<     << i + 1 <<   n ;     return 0;   }   