Create snowcow.cpp

1 files changed, 127 insertions, 0 deletions

diff --git a/2019/December/Platinum/snowcow.cpp b/2019/December/Platinum/snowcow.cpp
new file mode 100644
index 0000000..3c35f16
--- /dev/null
+++ b/2019/December/Platinum/snowcow.cpp
@@ -0,0 +1,127 @@
+#include <algorithm>
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <queue>
+#include <set>
+#include <map>
+#include <unordered_set>
+#include <unordered_map>
+#include <cmath>
+#include <cstring>
+#define io(s) if (fopen(((string)s+".in").c_str(), "r")) { freopen(((string)s+".in").c_str(), "r", stdin); freopen(((string)s+".out").c_str(), "w", stdout); } ios_base::sync_with_stdio(false); cin.tie(NULL)
+#define FOR(i, a, b, in) for (int i = (a); i < (b); i += in)
+#define REP(i, a, b) for (int i = (a); i < (b); i++)
+#define RFOR(i, a, b, in) for (int i = (a) - 1; i >= (b); i -= in)
+#define RREP(i, a, b) for (int i = (a) - 1; i >= (b); i--)
+#define trav(a, x) for (auto& a : x)
+#define mp make_pair
+#define pb push_back
+#define f first
+#define s second
+#define lb lower_bound
+#define ub upper_bound
+#define sz(x) (int)x.size()
+#define all(x) begin(x), end(x)
+#define rsz resize
+#define mem(a, b) memset(a, (b), sizeof(a))
+using namespace std;
+typedef string str;
+typedef long long ll;
+typedef long double ld;
+typedef pair<int, int> ii; typedef pair<ll, ll> pl; typedef pair<ld, ld> pd;
+typedef vector<int> vi; typedef vector<ll> vl; typedef vector<ld> vd;
+typedef vector<ii> vii; typedef vector<pl> vpl; typedef vector<pd> vpd;
+constexpr auto INF = (int)1e9;
+constexpr auto LINF = (ll)1e18;
+
+const int C = 1e5;
+
+int N, cnt = 0, L[100005], R[100005];
+ll seg[400005] = { 0 }, tmp[400005] = { 0 };
+vector<int> G[100005];
+set<ii> S[100005];
+
+void pull(int n) { seg[n] = seg[n << 1] + seg[n << 1 | 1]; }
+void push(int l, int r, int n) {
+	seg[n] += (r - l + 1) * tmp[n];
+	if (l != r) tmp[n << 1] += tmp[n], tmp[n << 1 | 1] += tmp[n];
+	tmp[n] = 0;
+}
+void update(int a, int b, ll v, int l = 1, int r = -1, int n = 1) {
+	if (r == -1) r = N;
+	push(l, r, n);
+	if (l > b || r < a) return;
+	if (l >= a && r <= b) {
+		tmp[n] += v;
+		push(l, r, n);
+	}
+	else {
+		int m = (l + r) >> 1;
+		update(a, b, v, l, m, n << 1), update(a, b, v, m + 1, r, n << 1 | 1);
+		pull(n);
+	}
+}
+ll query(int a, int b, int l = 1, int r = -1, int n = 1) {
+	if (r == -1) r = N;
+	if (a > b || l > b || r < a) return 0;
+	push(l, r, n);
+	if (l >= a && r <= b) return seg[n];
+	int m = (l + r) >> 1;
+	return query(a, b, l, m, n << 1) + query(a, b, m + 1, r, n << 1 | 1);
+}
+
+void dfs(int u, int p) {
+	L[u] = ++cnt;
+	for (auto& v : G[u]) if (v != p) dfs(v, u);
+	R[u] = cnt;
+}
+
+int main() {
+	io("snowcow");
+
+	int Q;
+	cin >> N >> Q;
+	for (int i = 1; i < N; i++) {
+		int a, b;
+		cin >> a >> b;
+		G[a].push_back(b);
+		G[b].push_back(a);
+	}
+
+	dfs(1, 0);
+
+	for (int i = 1; i <= C; i++) S[i].emplace(0, 0);
+
+	while (Q--) {
+		int t;
+		cin >> t;
+		if (t == 1) {
+			int x, c;
+			cin >> x >> c;
+			int l = L[x], r = R[x];
+			auto it = --S[c].lower_bound(ii(L[x], L[x]));
+			while (it != S[c].lower_bound(ii(R[x] + 1, R[x] + 1))) {
+				update(max(it->s + 1, L[x]), min(next(it) != S[c].end() ? next(it)->f - 1 : N, R[x]), 1);
+				if (it->s >= L[x] - 1) { // if intervals touch update l and r
+					l = min(it->f, l);
+					r = max(it->s, r);
+					it = S[c].erase(it);
+				}
+				else it++;
+			}
+			if (it != S[c].end() && it->f <= R[x] + 1) {
+				l = min(it->f, l);
+				r = max(it->s, r);
+				S[c].erase(it);
+			}
+			S[c].emplace(l, r);
+		}
+		else {
+			int x;
+			cin >> x;
+			cout << query(L[x], R[x]) << '\n';
+		}
+	}
+}