제출 #556890

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
556890		DanShaders	Sightseeing in Kyoto (JOI22_kyoto)	C++17	40 / 100	497 ms	71016 KiB

kyoto

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;

namespace x = __gnu_pbds;
template <typename T>
using ordered_set = x::tree<T, x::null_type, less<T>, x::rb_tree_tag, x::tree_order_statistics_node_update>;

template <typename T>
using normal_queue = priority_queue<T, vector<T>, greater<>>;

#define all(x) begin(x), end(x)
#define sz(x) ((int) (x).size())
#define x first
#define y second
using ll = long long;
using ld = long double;

#define int ll

const int N = 1e5 + 10, M = 2010, INF = 0x3f3f3f3f3f3f3f3f;

int suff[N];

int eliminate(int *a, int n, pair<int, int> *b) {
	suff[n] = +INF;
	for (int i = n; i--; ) {
		suff[i] = min(suff[i + 1], a[i]);
	}
	int mn = +INF, m = 0;
	for (int i = 0; i < n; ++i) {
		if (mn <= a[i] && suff[i + 1] <= a[i]) {
			continue;
		}
		mn = min(mn, a[i]);
		b[m++] = {a[i], i};
	}
	return m;
}

int a[N], b[N];
pair<int, int> c[M], d[M];
int dp[M][M];

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; ++i) {
		cin >> a[i];
	}
	for (int i = 0; i < m; ++i) {
		cin >> b[i];
	}
	n = eliminate(a, n, c);
	m = eliminate(b, m, d);

	fill(dp[0], dp[M], +INF);
	dp[0][0] = 0;
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < m; ++j) {
			dp[i + 1][j] = min(dp[i + 1][j], dp[i][j] + d[j].x * (c[i + 1].y - c[i].y));
			dp[i][j + 1] = min(dp[i][j + 1], dp[i][j] + c[i].x * (d[j + 1].y - d[j].y));
		}
	}
	cout << dp[n - 1][m - 1];
}

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 0 / 60