Submission #1262926

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262926		am_aadvik	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 KiB

worldmap

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

vector<int> g[45];
int res[1000][1000] = { 0 }, n, st = 500;
vector<bool> vis(45), used(45);

vector<int> dfs(int node, int si, int sj, int ei, int ej) {
	bool l = 1; 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];

			for (int i = (si - 1); i <= (ei + 1); ++i)
				res[i][sj - 1] = res[i][ej + 1] = node;
			for (int j = (sj - 1); j <= (ej + 1); ++j)
				res[si - 1][j] = res[ei + 1][j] = node;
			for (int i = (si - 1); i <= (ei + 1); ++i)
				res[i][ej + 3] = node;
			if (!used[node]) {
				int ci = si;
				for (auto x : g[node])
					res[ci][ej + 2] = x, ci += 2;
				for (int i = si; i <= ei; ++i)
					if (!res[i][ej + 2])
						res[i][ej + 2] = node;
				res[si - 1][ej + 2] = res[ei + 1][ej + 2] = node;
				--si, ++ei, --sj, ej += 3, used[node] = 1;
			}
			l = 0;
		}
	if (l == true) {
		if (si == -1) {
			for (int i = st; i <= (st + n + n); ++i)
				res[i][st] = node;
			si = sj = ej = st, ei = st + n + n;
		}
		else {
			for (int i = (si - 1); i <= (ei + 1); ++i)
				res[i][sj - 1] = res[i][ej + 1] = node;
			for (int j = (sj - 1); j <= (ej + 1); ++j)
				res[si - 1][j] = res[ei + 1][j] = node;
			for (int i = (si - 1); i <= (ei + 1); ++i)
				res[i][ej + 3] = node;
			int ci = si;
			for (auto x : g[node])
				res[ci][ej + 2] = x, ci += 2;
			for (int i = si; i <= ei; ++i)
				if (!res[i][ej + 2])
					res[i][ej + 2] = node;
			--si, ++ei, --sj, ej += 3, used[node] = 1;
		}
	}
	return { si, sj, ei, ej };
}

vector<vector<int>> create_map(int N, int m, vector<int> a, vector<int> b) {
	n = N;
	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);
	int mx = max(x[2] - x[0] + 1, x[3] - x[1] + 1);
	vector<vector<int>> ans(mx, vector<int>(mx, 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 (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() {
	auto res = create_map(3, 2, { 1, 2 }, {2, 3});
	cout << res.size() << endl;
	for (auto x : res) {
		for (auto y : x)
			cout << y << " ";
		cout << endl;
	}
}*/

Compilation message (stderr)

worldmap.cpp: In function 'std::vector<std::vector<int> > create_map(int, int, std::vector<int>, std::vector<int>)':
worldmap.cpp:73:9: error: 'memset' was not declared in this scope
   73 |         memset(res, 0, sizeof(res));
      |         ^~~~~~
worldmap.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include <vector>
  +++ |+#include <cstring>
    3 | using namespace std;