143 lines
3.0 KiB
C++
143 lines
3.0 KiB
C++
/* Problem URL: https://codeforces.com/edu/course/2/lesson/7/2/practice/contest/289391/problem/I */
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#include <bits/stdc++.h>
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#include <ext/pb_ds/assoc_container.hpp>
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#include <ext/pb_ds/tree_policy.hpp>
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using namespace std;
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using namespace __gnu_pbds;
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template <class T, class comp = less<>>
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using ordered_set = tree<T, null_type , comp , rb_tree_tag , tree_order_statistics_node_update>;
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#define V vector
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#define rmin(a, b) a = min(a, b)
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#define rmax(a, b) a = max(a, b)
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#define rep(i, lim) for (int i = 0; i < (lim); i++)
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#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
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#define repv(i, v) for (auto &i : (v))
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#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
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#define sortv(v) sort(v.begin(), v.end())
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#define all(v) (v).begin(), (v).end()
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using vi = vector<int>;
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using vvi = vector<vi>;
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using vvvi = vector<vvi>;
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using vvvvi = vector<vvvi>;
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using ll = long long;
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using vl = vector<ll>;
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using vvl = vector<vl>;
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using vvvl = vector<vvl>;
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using vvvvl = vector<vvvl>;
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template<class v>
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auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
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os << vec[0];
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for (size_t i = 1; i < vec.size(); i++) {
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os << ' ' << vec[i];
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}
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os << '\n';
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return os;
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}
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template<class v>
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auto operator>>(istream &is, vector<v> &vec)->istream& {
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for (auto &i : vec) {
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is >> i;
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}
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return is;
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}
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template<class v>
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auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
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for (auto &i : vec) {
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os << i[0];
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for (size_t j = 1; j < i.size(); j++) {
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os << ' ' << i[j];
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}
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os << '\n';
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}
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return os;
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}
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template<class v>
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auto operator>>(istream &is, vector<vector<v>> &vec)->istream& {
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for (auto &i : vec) {
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for (auto &j : i) {
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is >> j;
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}
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}
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return is;
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}
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int main()
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{
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ios::sync_with_stdio(false);
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cin.tie(nullptr);
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int n, m;
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cin >> n >> m;
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vi dsu(n);
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rep(i, n) {
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dsu[i] = i;
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}
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vi depth(n);
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function<pair<int, int>(int)> find_p = [&](int i) -> pair<int, int>{
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if (dsu[i] == i) {
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return {i, 0};
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}
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auto ans = find_p(dsu[i]);
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dsu[i] = ans.first;
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depth[i] ^= ans.second;
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return {dsu[i], depth[i]};
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};
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auto join = [&](int a, int b) {
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auto ap = find_p(a);
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auto bp = find_p(b);
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dsu[bp.first] = ap.first;
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depth[bp.first] = (1 ^ bp.second ^ ap.second);
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};
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int shift = 0;
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function<void(int, int)> func[] = {
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[&](int a, int b) {
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join(a, b);
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},
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[&](int a, int b) {
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find_p(a);
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find_p(b);
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int ca = depth[a];
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int cb = depth[b];
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if (ca == cb) {
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cout << "YES\n";
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shift++;
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return;
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}
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cout << "NO\n";
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}
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};
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while (m--) {
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int op, a, b;
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cin >> op >> a >> b;
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a = (a + shift) % n;
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b = (b + shift) % n;
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func[op](a, b);
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}
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}
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