Submission #944960

#	Time	Username	Problem	Language	Result	Execution time	Memory
944960		hmm789	Meetings (IOI18_meetings)	C++14	19 / 100	3190 ms	401416 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
#define INF 1000000000000000000
#define int long long 

int fw[5000][5005];

void update(int i, int x, int v) {
	for(x++; x < 5005; x += x&-x) fw[i][x] += v;
}
int query(int i, int x) {
	int ans = 0;
	for(x++; x; x -= x&-x) ans += fw[i][x];
	return ans;
}
int query(int i, int x, int y) {
	return query(i, y) - query(i, x-1);
}

struct node2 {
	int s, e, m, v;
	node2 *l, *r;
	node2(int _s, int _e) {
		s = _s, e = _e, m = (s+e)/2, v = 0;
		if(s != e) {
			l = new node2(s, m);
			r = new node2(m+1, e);
		}
	}
	void update(int x, int val) {
		if(s == e) {v = val; return;}
		else if(x > m) r->update(x, val);
		else l->update(x, val);
		v = max(l->v, r->v);
	}
	int rmax(int x, int y) {
		if(x <= s && e <= y) return v;
		else if(x > m) return r->rmax(x, y);
		else if(y <= m) return l->rmax(x, y);
		else return max(l->rmax(x, y), r->rmax(x, y));
	}
} *root2;
#undef int
std::vector<long long> minimum_costs(std::vector<int> H, std::vector<int> L, std::vector<int> R) {
	#define int long long
	int n = H.size(), q = L.size();
	root2 = new node2(0, n-1);
	for(int i = 0; i < n; i++) root2->update(i, H[i]);
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < n; j++) update(i, j, root2->rmax(min(i,j), max(i,j)));
	}
	vector<int> ans(q);
	for(int i = 0; i < q; i++) {
		int tmp = INF;
		for(int j = L[i]; j <= R[i]; j++) tmp = min(tmp, query(j, L[i], R[i]));
		ans[i] = tmp;
	}
	return ans;
	#undef int
}

• Subtask 1: 4 / 4
• Subtask 2: 15 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40