제출 #132405

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
132405		Kewo	Two Antennas (JOI19_antennas)	C++17	22 / 100	469 ms	79488 KiB

antennas

#include <bits/stdc++.h>
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define mid ((x + y) / 2)
#define left (ind * 2)
#define right (ind * 2 + 1)
#define mp make_pair
#define timer ((double)clock() / CLOCKS_PER_SEC)
#define endl "\n"
#define spc " "
#define d1(x) cerr<<#x<<":"<<x<<endl
#define d2(x, y) cerr<<#x<<":"<<x<<" "<<#y<<":"<<y<<endl
#define d3(x, y, z) cerr<<#x<<":"<<x<<" "<<#y<<":"<<y<<" "<<#z<<":"<<z<<endl
#define fast_io() ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;

typedef long long int lli;
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<double, double> dd;

const int N = (int)(1e6 + 5);
const int LOG = (int)(20);
const int inf = (int)(1e9 + 5);

int n, q, h[N], a[N], b[N], ans, tree[N << 2];
vector<int> v[N];
vector<ii> pt[N];

void upd(int ind, int x, int y, int a, int val) {
	if(y < a || a < x)
		return;
	if(x == y && x == a) {
		tree[ind] = val;
		return;
	}
	upd(left, x, mid, a, val);
	upd(right, mid + 1, y, a, val);
	tree[ind] = max(tree[left], tree[right]);
}

int get(int ind, int x, int y, int a, int b) {
	if(b == 0)
		return -inf;
	if(y < a || b < x)
		return -inf;
	if(a <= x && y <= b)
		return tree[ind];
	return max(get(left, x, mid, a, b), get(right, mid + 1, y, a, b));
}

void solve() {
	memset(tree, -1, sizeof tree);
	for(int i = 1; i <= n; i++)
		pt[i].clear();
	for(int i = 1; i <= n; i++) {
		pt[min(n, i + a[i])].pb({i, 0});
		pt[min(n + 1, i + b[i] + 1)].pb({i, 1});
	}
	for(int i = 1; i <= n; i++) {
		for(auto j : pt[i]) {
			if(j.se == 0)
				upd(1, 1, n, j.fi, h[j.fi]);
			else
				upd(1, 1, n, j.fi, -1);
		}
		ans = max(ans, get(1, 1, n, max(1, i - b[i]), max(0, i - a[i])) - h[i]);
	}
}

int main() {
	fast_io();
	// freopen("inp.in", "r", stdin);
	
	cin >> n;
	for(int i = 1; i <= n; i++)
		cin >> h[i] >> a[i] >> b[i];
	cin >> q;
	for(int i = 1; i <= q; i++) {
		int a, b;
		cin >> a >> b;
		// v[b].pb({a, i});
	}
	solve();
	reverse(a + 1, a + n + 1);
	reverse(b + 1, b + n + 1);
	reverse(h + 1, h + n + 1);
	solve();
	cout << ans;
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 11
• Subtask 3: 22 / 22
• Subtask 4: 0 / 65