Submission #765184

#	Time	Username	Problem	Language	Result	Execution time	Memory
765184		SanguineChameleon	Teams (IOI15_teams)	C++17	21 / 100	4059 ms	151752 KiB

teams

#include "teams.h"
#include <bits/stdc++.h>
using namespace std;

const int maxN = 5e5 + 20;
const int maxL = 20;
const int maxM = 2e5 + 20;
vector<int> add[maxN];
int tree[maxN * maxL];
int ch[maxN * maxL][2];
int root[maxN * 4];
int node_cnt;
int N;

int update(int cur_id, int lt, int rt, int pos) {
	int new_id = ++node_cnt;
	if (lt == rt) {
		tree[new_id] = tree[cur_id] + 1;
		return new_id;
	}
	int mt = (lt + rt) / 2;
	if (pos <= mt) {
		ch[new_id][0] = update(ch[cur_id][0], lt, mt, pos);
		ch[new_id][1] = ch[cur_id][1];
	}
	else {
		ch[new_id][0] = ch[cur_id][0];
		ch[new_id][1] = update(ch[cur_id][1], mt + 1, rt, pos);
	}
	tree[new_id] = tree[ch[new_id][0]] + tree[ch[new_id][1]];
	return new_id;
}

void init(int _N, int A[], int B[]) {
	N = _N;
	for (int i = 0; i < N; i++) {
		add[B[i]].push_back(A[i]);
	}
	for (int i = N; i >= 1; i--) {
		root[i] = root[i + 1];
		for (auto pos: add[i]) {
			root[i] = update(root[i], 1, N, pos);
		}
	}
}

int get(int id, int lt, int rt, int ql, int qr) {
	if (lt == ql && rt == qr) {
		return tree[id];
	}
	int mt = (lt + rt) / 2;
	if (qr <= mt) {
		return get(ch[id][0], lt, mt, ql, qr);
	}
	else if (ql >= mt + 1) {
		return get(ch[id][1], mt + 1, rt, ql, qr);
	}
	else {
		return get(ch[id][0], lt, mt, ql, mt) + get(ch[id][1], mt + 1, rt, mt + 1, qr);
	}
}

int get(int lx, int rx, int ly) {
	if (lx > rx) {
		return 0;
	}
	return get(root[ly], 1, N, lx, rx);
}

int dp[maxM];

int can(int M, int K[]) {
	long long sum = 0;
	for (int i = 0; i < M; i++) {
		sum += K[i];
	}
	if (sum > N) {
		return 0;
	}
	sort(K, K + M);
	for (int i = 0; i < M; i++) {
		dp[i] = get(1, K[i], K[i]) - K[i];
		for (int j = 0; j < i; j++) {
			dp[i] = min(dp[i], dp[j] + get(K[j] + 1, K[i], K[i]) - K[i]);
		}
		if (dp[i] < 0) {
			return false;
		}
	}
	return true;
}

• Subtask 1: 21 / 21
• Subtask 2: 0 / 13
• Subtask 3: 0 / 43
• Subtask 4: 0 / 23