#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, q;
  cin >> n >> q;
  std::vector<vector<int>> v;
  v.resize(2, vector<int>(n, 0));
  int ans = 0;
  while (q--) {
    int change = 0;
    int x, y;
    cin >> x >> y;
    x--;
    y--;
    if (v[x][y] == 0)
      change++;
    else
      change--;
    v[x][y] = 1 - v[x][y];
    for (int i = -1; i <= 1; i++) {
      if (y + i >= n && y + i <= 0) continue;
      if (v[1 - x][y + i] == 1) ans += change;
    }
    if (ans == 0)
      cout << "YES\n";
    else
      cout << "NO\n";
  }
}
