Submission #1249784

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249784		gelastropod	Souvenirs (IOI25_souvenirs)	C++20	100 / 100	15 ms	412 KiB

souvenirs

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

void buy_souvenirs(signed N, long long P0) {
	vector<int> numbought(N, 0);
	vector<int> P(N, -1);
	P[0] = P0;
	vector<pair<vector<signed>, int>> vals;
	while (true) {
		bool done = true;
		int crnt = P0, ind = -1;
		for (int i = N - 1; i >= 0; i--) {
			if (P[i] == -1) {
				done = false;
				ind = i;
			}
			if (ind != -1 && P[i] != -1) break;
		}
		if (done) break;
		ind--;
		for (auto& i : vals) {
			if (i.first[0] > ind) {
				ind = i.first[0];
			}
		}
		crnt = P[ind] - 1;
		for (auto& i : vals) {
			if (i.first[0] == ind) {
				crnt = i.second;
				for (int j : i.first) {
					crnt += j - i.first[0];
				}
				crnt = (crnt - 1) / i.first.size();
				break;
			}
		}
		int asdasddsa = 0;
		while (true) {
			auto i = transaction(crnt);
			i.second = crnt - i.second;
			vector<signed> aaa;
			for (int j : i.first) {
				numbought[j]++;
				if (P[j] == -1) aaa.push_back(j);
				else i.second -= P[j];
			}
			i.first = aaa;
			ind = i.first[0];
			vals.push_back(i);
			for (int j : i.first) {
				i.second += j - i.first[0];
			}
			crnt = (i.second - 1) / i.first.size();
			if (i.first.size() == 1) break;
		}
		for (int i = 0; i < N; i++) {
			if (vals.empty()) break;
			auto iter = vals.end();
			iter--;
			while (iter != vals.begin()) {
				vector<signed> aaa;
				for (int i : iter->first) {
					if (P[i] == -1) aaa.push_back(i);
					else iter->second -= P[i];
				}
				iter->first = aaa;
				if (iter->first.size() == 1) {
					P[iter->first[0]] = iter->second;
					iter = vals.erase(iter);
				}
				iter--;
			}
			vector<signed> aaa;
			for (int i : iter->first) {
				if (P[i] == -1) aaa.push_back(i);
				else iter->second -= P[i];
			}
			iter->first = aaa;
			if (iter->first.size() == 1) {
				P[iter->first[0]] = iter->second;
				vals.erase(iter);
			}
		}
	}
	for (int i = 0; i < N; i++) {
		for (int j = numbought[i]; j < i; j++) {
			transaction(P[i]);
		}
	}
	return;
}

• Subtask 0: 0 / 0
• Subtask 1: 4 / 4
• Subtask 2: 3 / 3
• Subtask 3: 14 / 14
• Subtask 4: 18 / 18
• Subtask 5: 28 / 28
• Subtask 6: 33 / 33