func_code_string: #include <bits/stdc++.h>   int main() {     long long n, m, i;     scanf( %lld%lld , &n, &m);     printf( YES n );     for (i = n; i < m; i += 2) printf( %lld %lld n , i, i + 1);     printf(  n );     return 0;   }   