#include #define fi first #define se second #define rep(i,s,n) for (int i = (s); i < (n); ++i) #define rrep(i,n,g) for (int i = (n)-1; i >= (g); --i) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define len(x) (int)(x).size() #define dup(x,y) (((x)+(y)-1)/(y)) #define pb push_back #define eb emplace_back #define Field(T) vector> using namespace std; using ll = long long; using ull = unsigned long long; template using pq = priority_queue,greater>; using P = pair; templatebool chmax(T&a,T b){if(abool chmin(T&a,T b){if(b> q >> k; if (k >= 5|| (k == 4 && q <= 4) || (k == 3 && q <= 3) || (k == 2 && q == 1)) { vector a = {1, 1, 2, 2, 2}; vector b = {2, 3, 4, 5, 5}; cout << "Yes" << endl; rep(i,0,min(q, 5)) { cout << a[i] << " " << b[i] << endl; } rep(i,0,q-5) { cout << 6 << " " << 7 << endl; } return 0; } if (k == 4 && q == 5) { cout << "Yes" << endl; cout << 1 << " " << 2 << endl; cout << 1 << " " << 3 << endl; cout << 2 << " " << 4 << endl; cout << 3 << " " << 5 << endl; cout << 2 << " " << 6 << endl; return 0; } cout << "No" << endl; return 0; }