Submission #574392

#	Time	Username	Problem	Language	Result	Execution time	Memory
574392		wjajjsasqq	Distributing Candies (IOI21_candies)	C++17	11 / 100	5025 ms	9704 KiB

candies

#include "candies.h"
#include <algorithm>
#include <cstdio>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")

const int INF = 1070000000;

const int N = 200008;
int n, a[N], c[N], C, res[N];
long long inc[N];

std::vector<int> distribute_candies(std::vector<int> c_, std::vector<int> l, std::vector<int> r, std::vector<int> v) {
	n = (int)c_.size();
	std::vector<int> ans(n);
	for (int i = 0; i < n; ++i) c[i] = c_[i];
	if (n <= 2000 && l.size() <= 2000) {
		for (int i = 0; i < (int)l.size(); ++i) {
			int ll = l[i], rr = r[i] + 1, d = v[i];
			for (int j = ll; j < rr; ++j) a[j] += d;
			if (d > 0) {
				for (int j = ll; j < rr; ++j) a[j] = a[j] < c[j] ? a[j] : c[j];
			} else {
				for (int j = ll; j < rr; ++j) a[j] = a[j] < 0 ? 0 : a[j];
			}
		}
		for (int i = 0; i < n; ++i) ans[i] = a[i];
	} else {
		bool pos = 1;
		for (int i = 0; i < (int)v.size(); ++i) if (v[i] < 0) pos = 0;
		if (pos) {
			for (int i = 0; i < (int)l.size(); ++i) {
				inc[l[i]] += v[i];
				inc[r[i] + 1] -= v[i];
			}
			for (int i = 0; i < n; ++i) {
				if (i) inc[i] += inc[i - 1];
				ans[i] = std::min((long long)c[i], inc[i]);
			}
		} else {
			C = c[0];
			for (int i = 0; i < (int)l.size(); ++i) {
				int ll = l[i], rr = r[i] + 1, d = v[i];
				for (int j = ll; j < rr; ++j) res[j] += d;
				if (d < 0) {
					for (int j = 0; j < n; ++j) res[j] = res[j] < 0 ? 0 : res[j];
				}
				else {
					for (int j = 0; j < n; ++j) res[j] = res[j] < C ? res[j] : C;
				}
			}
			for (int j = 0; j < n; ++j) ans[j] = res[j];
		}
	}
	return ans;
}

• Subtask 1: 3 / 3
• Subtask 2: 8 / 8
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 33