Submission #710908

#	Time	Username	Problem	Language	Result	Execution time	Memory
710908		pavement	Rainy Markets (CCO22_day1problem2)	C++17	5 / 25	466 ms	123824 KiB

Main

#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)
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>;
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, ans, srb, B[1000005], P[1000005], U[1000005], V[1000005], ml[1000005], mr[1000005], OP[1000005];
vector<iii> rb;

int fill(int &a, int &b) {
	if (a >= b) {
		int tmp = b;
		a -= b;
		b = 0;
		return tmp;
	} else {
		int tmp = a;
		b -= a;
		a = 0;
		return tmp;
	}
}

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> B[i];
	}
	for (int i = 1; i < N; i++) {
		cin >> P[i];
		OP[i] = P[i];
	}
	for (int i = 1; i < N; i++) {
		cin >> U[i];
		int tmp = P[i];
		P[i] = max(0ll, P[i] - U[i]);
		V[i] = tmp - P[i];
	}
	for (int i = 1; i < N; i++) {
		ml[i] += fill(B[i], P[i]);
		mr[i] += fill(B[i + 1], P[i]);
		if (P[i]) {
			if (srb < P[i]) return cout << "NO\n", 0;
			int cnt = 0;
			while (cnt < P[i]) {
				auto [v, idx, dir] = rb.back();
				if (cnt + v > P[i]) {
					if (dir) mr[idx] -= P[i] - cnt;
					else ml[idx] -= P[i] - cnt;
					V[idx] += P[i] - cnt;
					g0(rb.back()) -= P[i] - cnt;
					srb -= P[i] - cnt;
					cnt = P[i];
				} else {
					if (dir) mr[idx] -= v;
					else ml[idx] -= v;
					V[idx] += v;
					cnt += v;
					srb -= v;
					rb.ppb();
				}
			}
			P[i] = 0;
		}
		int tmp1 = fill(B[i], V[i]);
		int tmp2 = fill(B[i + 1], V[i]);
		ml[i] += tmp1;
		mr[i] += tmp2;
		srb += tmp1 + tmp2;
		rb.eb(tmp1, i, 0);
		rb.eb(tmp2, i, 1);
		if (B[i]) {
			rb.clear();
		}
	}
	for (int i = 1; i < N; i++) {
		ans += V[i];
	}
	cout << "YES\n" << ans << '\n';
	for (int i = 1; i < N; i++) {
		assert(ml[i] + V[i] + mr[i] == OP[i]);
		cout << ml[i] << ' ' << V[i] << ' ' << mr[i] << '\n';
	}
}

Compilation message (stderr)

Main.cpp:43:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   43 | main() {
      | ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 6
• Subtask 4: 0 / 9