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- #include <iostream>
- #include <vector>
- #include <cmath>
- #include <algorithm>
- #include <map>
- #include <set>
- using namespace std;
- typedef long long ll;
- void solve() {
- int n, q;
- cin >> n >> q;
- vector < vector<bool>> a(3, vector<bool>(n + 1));
- int ans = 0;
- for (int i = 0; i < q; ++i) {
- int r, c;
- cin >> r >> c;
- --r;
- int x = (a[r][c] ? -1 : 1);
- a[r][c] = !a[r][c];
- for (int i = -1; i <= 1; ++i) {
- if (i + c <= 0 || i + c > n)
- continue;
- if (a[(r + 1) % 2][i + c]) {
- ans += x;
- }
- }
- cout << ((ans > 0) ? "No\n" : "Yes\n");
- }
- }
- int main()
- {
- ios_base::sync_with_stdio(false);
- cin.tie(0);
- cout.tie(0);
- solve();
- }
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