Submission #1263104

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263104		am_aadvik	World Map (IOI25_worldmap)	C++20	86 / 100	60 ms	9340 KiB

worldmap

#include <iostream>
#include <vector>
#include <cstring>
#include <map>
using namespace std;

vector<int> g[45];
int res[1000][1000] = { 0 }, n, st = 0;
vector<bool> vis(45), used(45);

vector<int> dfs(int node, int si, int sj, int ei, int ej) {
	if (si == -1) {
		for (int i = st; i <= (st + n + n); i += 2)
			res[i][st] = node;
		si = st, ei = st + n + n, ej = sj = st;
		used[node] = 1;
	}
	else {
		int sic = (res[si][ej] == 0 ? si : si + 1);
		int sip = (res[si][ej] == 0 ? si + 1 : si);
		for (int i = sic; i <= ei; i += 2)
			res[i][ej] = node;
		for (int i = sip; i <= ei; i += 2)
			res[i][ej + 1] = node;
		if (!used[node]) {
			int y = sic;
			for (auto x : g[node])
				res[y][ej + 1] = x, y += 2;
			for (int i = si; i <= ei; ++i)
				if (!res[i][ej + 1])
					res[i][ej + 1] = node;
			for (int i = sic; i <= ei; i += 2)
				res[i][ej + 2] = node;
			used[node] = 1, ej += 2;
		}
		else ++ej;
	}
	vis[node] = 1;
	for (auto x : g[node])
		if (!vis[x]) {
			auto r = dfs(x, si, sj, ei, ej);
			si = r[0], sj = r[1], ei = r[2], ej = r[3];

			if (si == -1) {
				for (int i = st; i <= (st + n + n + 5); i += 2)
					res[i][st] = node;
				si = st, ei = st + n + n + 5, ej = sj = st;
				used[node] = 1;
			}
			else {
				int sic = (res[si][ej] == 0 ? si : si + 1);
				int sip = (res[si][ej] == 0 ? si + 1 : si);
				for (int i = sic; i <= ei; i += 2)
					res[i][ej] = node;
				for (int i = sip; i <= ei; i += 2)
					res[i][ej + 1] = node;
				if (!used[node]) {
					int y = sic;
					for (auto x : g[node])
						res[y][ej + 1] = x, y += 2;
					for (int i = si; i <= ei; ++i)
						if (!res[i][ej + 1])
							res[i][ej + 1] = node;
					for (int i = sic; i <= ei; i += 2)
						res[i][ej + 2] = node;
					used[node] = 1, ej += 2;
				}
				else ++ej;
			}
		}
	return { si, sj, ei, ej };
}

vector<vector<int>> create_map(int N, int m, vector<int> a, vector<int> b) {
	n = N;
	if (n == 1) return{ {1} };
	if (n == 2) return { {1, 2}, {1, 2} };
	for (int i = 0; i < m; ++i)
		g[a[i]].push_back(b[i]),
		g[b[i]].push_back(a[i]);
	auto x = dfs(1, -1, -1, -1, -1);
	vector<vector<int>> ans(x[2] - x[0] + 1, vector<int>(x[3] - x[1] + 1));
	int si = x[0], sj = x[1];
	for (int i = si; i <= x[2]; ++i)
		for (int j = sj; j <= x[3]; ++j)
			ans[i - si][j - sj] = res[i][j];
	for (auto &x : ans) for (auto &y : x) y = max(1, y);
	while (ans.size() < ans[0].size())
		ans.push_back(ans[0]);
	while (ans.size() > ans[0].size())
		for (int i = 0; i < ans.size(); ++i)
			ans[i].push_back(ans[i].back());
	for (int i = 0; i <= n; ++i)
		g[i].clear();
	memset(res, 0, sizeof(res));
	vis.assign(45, 0), used.assign(45, 0);
	return ans;
}
/*int main() {
	int n, m; cin >> n >> m;
	vector<int> a(m), b(m);
	map<pair<int, int>, bool> mp;
	for (int i = 1; i <= n; ++i) mp[{i, i}] = 1;
	for (int i = 0; i < m; mp[{a[i], b[i]}] = 1, ++i)
		cin >> a[i] >> b[i];
	auto res = create_map(n, m, a, b);
	cout << res.size() << endl;
	for (auto x : res) {
		for (auto y : x)
			cout << y << " ";
		cout << endl;
	}
	for (int i = 0; i < res.size(); ++i)
		for (int j = 0; j < res.size(); ++j) {
			if (i < (res.size() - 1))
				if (!mp[{res[i + 1][j], res[i][j]}] && !mp[{res[i][j], res[i + 1][j]}])
				{
					cout << "FAIL!"; return 0;
				}
			if (j < (res.size() - 1))
				if (!mp[{res[i][j + 1], res[i][j]}] && !mp[{res[i][j], res[i][j + 1]}])
				{
					cout << "FAIL!"; return 0;
				}
		}
	cout << "Success!" << endl;
	cout << "R = " << (float)res.size() / (float)n << endl;
}*/

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 7 / 7
• Subtask 4: 8 / 8
• Subtask 5: 14 / 14
• Subtask 6: 42 / 56