제출 #715501

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
715501		pavement	수확 (JOI20_harvest)	C++17	0 / 100	5023 ms	37412 KiB

harvest

#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;
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
#define g4(a) get<4>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
using iiiii = tuple<int, int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

int N, M, L, C, Q, A[200005], B[200005], off[200005], lnk[200005], sz[200005], ans[200005];
bool on_cycle[200005];
ii to[200005];
vector<ii> adj[200005], qu[200005];
ordered_set<ii> S[200005];

int find(int x) {
	if (x == lnk[x]) return x;
	return lnk[x] = find(lnk[x]);
}

void unite(int a, int b) {
	a = find(a);
	b = find(b);
	if (a == b) return;
	if (sz[b] > sz[a]) swap(a, b);
	sz[a] += sz[b];
	lnk[b] = a;
}

void solve_tree(int n) {
	for (auto [u, w] : adj[n]) {
		solve_tree(u);
		off[u] += w;
		if (S[u].size() > S[n].size()) {
			swap(S[n], S[u]);
			swap(off[n], off[u]);
		}
		for (auto v : S[u]) {
			S[n].insert(mp(v.first + off[u] - off[n], v.second));
		}
	}
	for (auto [t, idx] : qu[n]) {
		ans[idx] = S[n].order_of_key(mp(t - off[n], (int)1e16));
	}
}

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N >> M >> L >> C;
	for (int i = 1; i <= N; i++) {
		cin >> A[i];
		lnk[i] = i;
		sz[i] = 1;
	}
	for (int i = 1; i <= N; i++) {
		int pos = ((A[i] - C) % L + L) % L;
		auto it = upper_bound(A + 1, A + 1 + N, pos);
		if (it == A + 1) {
			to[i] = mp(N, pos + L - A[N] + C);
		} else {
			--it;
			to[i] = mp(it - A, pos - *it + C);
		}
		unite(i, to[i].first);
		adj[to[i].first].eb(i, to[i].second);
	}
	for (int i = 1; i <= M; i++) {
		cin >> B[i];
		auto it = lower_bound(A + 1, A + 1 + N, B[i]);
		if (it == A + 1) {
			S[N].insert(mp(B[i] + L - A[N], i));
		} else {
			--it;
			S[it - A].insert(mp(B[i] - *it, i));
		}
	}
	cin >> Q;
	for (int i = 1, V, T; i <= Q; i++) {
		cin >> V >> T;
		qu[V].eb(T, i);
	}
	// handle nodes not on cycle
	for (int i = 1; i <= N; i++) {
		if (i == find(i)) {
			int tort = i, hare = i;
			do {
				hare = to[to[hare].first].first;
				tort = to[tort].first;
			} while (tort != hare);
			do {
				on_cycle[tort] = 1;
				tort = to[tort].first;
			} while (tort != hare);
		}
	}
	for (int i = 1; i <= N; i++) {
		if (on_cycle[i]) {
			for (auto [u, w] : adj[i]) if (!on_cycle[u]) {
				solve_tree(u);
				off[u] += w;
				if (S[u].size() > S[i].size()) {
					swap(S[i], S[u]);
					swap(off[i], off[u]);
				}
				for (auto v : S[u]) {
					S[i].insert(mp(v.first + off[u] - off[i], v.second));
				}
			}
		}
	}
	// handle nodes on cycle
	for (int i = 1; i <= N; i++) {
		if (i == find(i)) {
			int tort = i, hare = i;
			do {
				hare = to[to[hare].first].first;
				tort = to[tort].first;
			} while (tort != hare);
			vector<int> ord;
			int len = 0;
			do {
				ord.pb(tort);
				len += to[tort].second;
				tort = to[tort].first;
			} while (tort != hare);
			//~ int P = 0;
			//~ for (auto x : ord) {
				//~ cout << "AT " << x << '\n';
				//~ for (auto [v, _] : S[x]) {
					//~ v += off[x];
					//~ cout << "ADD " << ((P - v) % len + len) % len << '\n';
				//~ }
				//~ for (auto [t, idx] : qu[x]) {
					//~ int b = t - P + 1;
					//~ cout << "QUERY " << 0 << ' ' << (len - (b % len)) % len << '\n';
					//~ cout << "QUERY " << (len - (b % len)) % len + 1 << ' ' << len - 1 << '\n';
				//~ }
				//~ P += to[x].second;
			//~ }
			for (auto x : ord) {
				for (auto [t, idx] : qu[x]) {
					int cur = x, P = 0;
					do {
						P += to[cur].second;
						cur = to[cur].first;
						// dist cur -> x = len - P
						for (auto [v, _] : S[cur]) {
							if (t - v - (len - P) + 1 >= 0) {
								ans[idx] += (t - v - (len - P) + len) / len;
							}
						}
					} while (cur != x);
				}
			}
		}
	}
	for (int i = 1; i <= Q; i++) {
		cout << ans[i] << '\n';
	}
}

컴파일 시 표준 에러 (stderr) 메시지

harvest.cpp:65:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   65 | main() {
      | ^~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 20
• Subtask 3: 0 / 75