Add a bunch more stuff

Codeforces Round 1083 (Div. 2)/C. Simons and Posting Blogs.cpp

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+/* Problem URL: https://codeforces.com/contest/2205/problem/C */
+
+#include <bits/stdc++.h>
+#include <ext/pb_ds/assoc_container.hpp>
+#include <ext/pb_ds/tree_policy.hpp>
+
+using namespace std;
+using namespace __gnu_pbds;
+
+template <class T, class comp = less<>>
+using ordered_set = tree<T, null_type , comp , rb_tree_tag , tree_order_statistics_node_update>;
+
+#define V vector
+
+#define rmin(a, b) a = min(a, b)
+#define rmax(a, b) a = max(a, b)
+
+#define rep(i, lim) for (int i = 0; i < (lim); i++)
+#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
+
+#define repv(i, v) for (auto &i : (v))
+#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
+#define sortv(v) sort(v.begin(), v.end())
+#define all(v) (v).begin(), (v).end()
+
+using vi = vector<int>;
+using vvi = vector<vi>;
+using vvvi = vector<vvi>;
+using vvvvi = vector<vvvi>;
+
+using ll = long long;
+
+using vl = vector<ll>;
+using vvl = vector<vl>;
+using vvvl = vector<vvl>;
+using vvvvl = vector<vvvl>;
+
+template<class v>
+auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
+    os << vec[0];
+    for (size_t i = 1; i < vec.size(); i++) {
+        os << ' ' << vec[i];
+    }
+    os << '\n';
+    return os;
+}
+
+template<class v>
+auto operator>>(istream &is, vector<v> &vec)->istream& {
+    for (auto &i : vec) {
+        is >> i;
+    }
+    return is;
+}
+
+template<class v>
+auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
+    for (auto &i : vec) {
+        os << i[0];
+        for (size_t j = 1; j < i.size(); j++) {
+            os << ' ' << i[j];
+        }
+        os << '\n';
+    }
+    return os;
+}
+
+template<class v>
+auto operator>>(istream  &is, vector<vector<v>> &vec)->istream& {
+    for (auto &i : vec) {
+        for (auto &j : i) {
+            is >> j;
+        }
+    }
+    return is;
+}
+
+const int oo = INT32_MAX >> 1;
+const ll OO = INT64_MAX >> 1;
+
+
+void pre()
+{
+
+}
+
+#define TEST 1
+
+void solve()
+{
+    int n;
+    cin >> n;
+
+    vvi act(n);
+    rep(i, n) {
+        int m;
+        cin >> m;
+        act[i].resize(m);
+        cin >> act[i];
+    }
+
+    V<bool> used(1e6 + 1);
+
+    vi t(n);
+    iota(all(t), 0);
+    vi ans;
+    while (true) {
+        if (t.empty()) {
+            break;
+        }
+
+        vi ch = t;
+        vi tmp;
+        while (ch.size() > 1) {
+            int a = oo;
+            repv(j, ch) {
+                while (!act[j].empty() && used[act[j].back()]) {
+                    act[j].pop_back();
+                }
+
+                if (act[j].empty()) {
+                    a = oo;
+                    break;
+                }
+
+                if (act[j].back() < a) {
+                    tmp.clear();
+                    tmp.push_back(j);
+                    a = act[j].back();
+                    continue;
+                }
+
+                if (act[j].back() == a) {
+                    tmp.push_back(j);
+                }
+            }
+
+            if (a == oo) {
+                break;
+            }
+
+            used[a] = true;
+            ans.push_back(a);
+            swap(ch, tmp);
+            tmp.clear();
+        }
+
+        bool rem = false;
+        int cur = 0;
+        rep(i, t.size()) {
+            while (!act[t[i]].empty() && used[act[t[i]].back()]) {
+                act[t[i]].pop_back();
+            }
+
+            if (act[t[i]].empty()) {
+                rem = true;
+                continue;
+            }
+
+            t[cur] = t[i];
+            cur++;
+        }
+        while (t.size() > cur) {
+            t.pop_back();
+        }
+
+        if (rem) {
+            continue;
+        }
+
+        while (!act[ch[0]].empty()) {
+            int j = act[ch[0]].back();
+            act[ch[0]].pop_back();
+            if (used[j]) {
+                continue;
+            }
+            used[j] = true;
+            ans.push_back(j);
+        }
+    }
+
+    cout << ans;
+}
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    pre();
+
+    int t;
+    (TEST && cin >> t) || (t = 1);
+    while (t--) {
+        solve();
+    }
+}