oj.uz

Submission #420814

# Submission time Handle Problem Language Result Execution time Memory
420814 2021-06-08T14:03:27 Z Berted Izvanzemaljci (COI21_izvanzemaljci) C++14
21 / 100
 56 ms 8140 KB 
#include <iostream>
#include <cassert>
#include <algorithm>
#include <vector>
#define int long long
#define pii pair<int, int>
#define ppi pair<pii, int>
#define fst first
#define snd second

using namespace std;

const int INF = 1e9 + 7;

int N, K;
pii A[100001];

pii prefMin[100001], sufMin[100001];
pii prefMax[100001], sufMax[100001];
vector<ppi> ans;

inline bool comp(const pii &L, const pii &R) {return make_pair(L.snd, L.fst) < make_pair(R.snd, R.fst);}
inline void solve()
{
	for (int i = 0; i < N; i++)
	{
		prefMin[i] = A[i]; prefMax[i] = A[i];
		if (i) 
		{
			prefMin[i].fst = min(prefMin[i - 1].fst, prefMin[i].fst);
			prefMin[i].snd = min(prefMin[i - 1].snd, prefMin[i].snd);
			prefMax[i].fst = max(prefMax[i - 1].fst, prefMax[i].fst);
			prefMax[i].snd = max(prefMax[i - 1].snd, prefMax[i].snd);
		}
	}
	for (int i = N - 1; i >= 0; i--)
	{
		sufMin[i] = A[i]; sufMax[i] = A[i];
		if (i + 1 < N)
		{
			sufMin[i].fst = min(sufMin[i + 1].fst, sufMin[i].fst);
			sufMin[i].snd = min(sufMin[i + 1].snd, sufMin[i].snd);
			sufMax[i].fst = max(sufMax[i + 1].fst, sufMax[i].fst);
			sufMax[i].snd = max(sufMax[i + 1].snd, sufMax[i].snd);
		}
	}
	for (int i = 0; i + 1 < N; i++)
	{
		pii aL = prefMin[i], aR = prefMax[i], bL = sufMin[i + 1], bR = sufMax[i + 1];
		int sA = max(aR.fst - aL.fst, aR.snd - aL.snd);
		int sB = max(bR.fst - bL.fst, bR.snd - bL.snd);

		//cerr << "P: " << A[i].fst << " " << A[i].snd << "\n";

		if (sA == 0) {sA = 1;}
		if (sB == 0) {sB = 1;}

		aL.fst = aR.fst - sA; aL.snd = aR.snd - sA;

		pii iL = {max(aL.fst, bL.fst), max(aL.snd, bL.snd)};
		pii iR = {min(aL.fst + sA, bL.fst + sB), min(aL.snd + sA, bL.snd + sB)};

		if (iL.fst <= iR.fst && iL.snd <= iR.snd) continue;

		if (sA > sB)
		{
			if (ans.size() && ans[0].snd <= sA) continue;
			ans.clear();
			ans.push_back({aL, sA}); ans.push_back({bL, sB});
		}
		else
		{
			if (ans.size() && ans[0].snd <= sB) continue;
			ans.clear();
			ans.push_back({bL, sB}); ans.push_back({aL, sA});
		}

	}

	//cerr << "DONE " << ans[0].snd << "\n";

}

int32_t main()
{
	ios :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> N >> K;
	if (K == 1)
	{
		int mnY = INF, mxY = -INF, mnX = INF, mxX = -INF;
		for (int i = 0; i < N; i++)
		{
			int x, y; cin >> x >> y;
			mnY = min(mnY, y); mxY = max(mxY, y);
			mnX = min(mnX, x); mxX = max(mxX, x);
		}
		//cout << mnX << " " << mnY << " " << max(1LL, max(mxX - mnX, mxY - mnY)) << "\n";
	}
	else if (K == 2)
	{
		int mnY = INF, mxY = -INF, mnX = INF, mxX = -INF;
		for (int i = 0; i < N; i++) 
		{
			cin >> A[i].fst >> A[i].snd;
			mnY = min(mnY, A[i].snd); mxY = max(mxY, A[i].snd);
			mnX = min(mnX, A[i].fst); mxX = max(mxX, A[i].fst);
		}
		
		ans.push_back({{mnX, mnY}, max(1LL, max(mxX - mnX, mxY - mnY))});
		ans.push_back({{-2000000000, -2000000000}, 1});

		sort(A, A + N); solve();
		sort(A, A + N, comp); solve();

		//if (ans.size() < K) return 0;

		for (int i = 0; i < K; i++)
		{
			cout << ans[i].fst.fst << " " << ans[i].fst.snd << " " << ans[i].snd << "\n";
		}
	}
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 56 ms 8004 KB Output is correct
11 Correct 54 ms 8024 KB Output is correct
12 Correct 54 ms 8128 KB Output is correct
13 Correct 56 ms 8020 KB Output is correct
14 Correct 56 ms 8012 KB Output is correct
15 Correct 55 ms 8012 KB Output is correct
16 Correct 55 ms 8020 KB Output is correct
17 Correct 49 ms 7384 KB Output is correct
18 Correct 49 ms 7168 KB Output is correct
19 Correct 44 ms 6596 KB Output is correct
20 Correct 48 ms 7096 KB Output is correct
21 Correct 55 ms 8080 KB Output is correct
22 Correct 55 ms 8140 KB Output is correct
23 Correct 55 ms 8120 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -