oj.uz

Submission #308280

# Submission time Handle Problem Language Result Execution time Memory
308280 2020-09-30T18:51:04 Z cki86201 Hamburg Steak (JOI20_hamburg) C++17
15 / 100
 471 ms 13536 KB 
#include <bits/stdc++.h>
using namespace std;

#define Fi first
#define Se second
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define szz(x) (int)(x).size()
#define rep(i, n) for(int i=0;i<(n);i++)
typedef tuple<int, int, int> t3;

const int INF = 1e9 + 10, M = 4e5 + 5;
int N, K;
vector <int> vx, vy;
struct rect {
	int x1, y1, x2, y2;
	bool In(int x, int y) {
		return x1 <= x && x <= x2 && y1 <= y && y <= y2;
	}
} R[200020];

void trial(vector <pii> ans) {
	if(szz(ans) == 0 || szz(ans) > K) return;
	while(szz(ans) < K) ans.pb(ans[0]);
	for(int i=1;i<=N;i++) {
		int r = 0;
		for(auto &[x, y] : ans) if(R[i].In(x, y)) {
			r = 1; break;
		}
		if(r == 0) return;
	}
	for(auto [x, y] : ans) printf("%d %d\n", vx[x-1], vy[y-1]);
	exit(0);
}

int arr[4*M+5];
vector <int> solve_linear(vector <pii> R) {
	for(int i=1;i<=M;i++) arr[i] = INF;
	for(auto [x, y] : R) arr[x] = min(arr[x], y);
	for(int i=M-1;i;i--) arr[i] = min(arr[i], arr[i+1]);
	vector <int> res;
	for(int t=1;arr[t]!=INF;t=arr[t]+1) res.pb(arr[t]);
	return res;
}

void solve(vector <int> rst, int k, vector <pii> ans) {
	if(szz(rst) == 0) trial(ans);
	if(k == 0) return;
	int lx = INF, rx = -INF, ly = INF, ry = -INF;
	for(int i : rst) {
		lx = min(lx, R[i].x2);
		rx = max(rx, R[i].x1);
		ly = min(ly, R[i].y2);
		ry = max(ry, R[i].y1);
	}
	if(k == 1) {
		if(lx >= rx && ly >= ry) {
			ans.pb({rx, ry});
			trial(ans);
		}
		return;
	}
	if(lx >= rx) {
		vector <pii> V;
		for(int i : rst) V.pb({R[i].y1, R[i].y2});
		auto ys = solve_linear(V);
		for(int y : ys) ans.pb({rx, y});
		trial(ans);
		return;
	}
	if(ly >= ry) {
		vector <pii> V;
		for(int i : rst) V.pb({R[i].x1, R[i].x2});
		auto xs = solve_linear(V);
		for(int x : xs) ans.pb({x, ry});
		trial(ans);
		return;
	}
	vector <pii> vert;
	for(int x : {lx, rx}) for(int y : {ly, ry}) vert.pb({x, y});
	for(auto [x, y] : vert) {
		vector <int> nst;
		for(int i : rst) if(!R[i].In(x, y)) nst.pb(i);
		auto ans2 = ans; ans2.pb({x, y});
		solve(nst, k - 1, ans2);
	}
}

int main() {
	scanf("%d%d", &N, &K);
	if(K == 4) return 0;
	for(int i=1;i<=N;i++) {
		scanf("%d%d%d%d", &R[i].x1, &R[i].y1, &R[i].x2, &R[i].y2);
		vx.pb(R[i].x1), vx.pb(R[i].x2);
		vy.pb(R[i].y1), vy.pb(R[i].y2);
	}
	sort(all(vx)); vx.resize(unique(all(vx)) - vx.begin());
	sort(all(vy)); vy.resize(unique(all(vy)) - vy.begin());
	for(int i=1;i<=N;i++) {
		auto &[x1, y1, x2, y2] = R[i];
		x1 = (int)(lower_bound(all(vx), x1) - vx.begin()) + 1;
		y1 = (int)(lower_bound(all(vy), y1) - vy.begin()) + 1;
		x2 = (int)(lower_bound(all(vx), x2) - vx.begin()) + 1;
		y2 = (int)(lower_bound(all(vy), y2) - vy.begin()) + 1;
	}
	vector <int> rst;
	for(int i=1;i<=N;i++) rst.pb(i);
	solve(rst, K, {});
	return 0;
}

Compilation message

hamburg.cpp: In function 'int main()':
hamburg.cpp:93:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   93 |  scanf("%d%d", &N, &K);
      |  ~~~~~^~~~~~~~~~~~~~~~
hamburg.cpp:96:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   96 |   scanf("%d%d%d%d", &R[i].x1, &R[i].y1, &R[i].x2, &R[i].y2);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 4 ms 416 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 2048 KB Output is correct
2 Correct 7 ms 2048 KB Output is correct
3 Correct 7 ms 2048 KB Output is correct
4 Correct 7 ms 2048 KB Output is correct
5 Correct 6 ms 2072 KB Output is correct
6 Correct 6 ms 2048 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 3 ms 524 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct

Subtask #4
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 256 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #5
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 4 ms 416 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 414 ms 8400 KB Output is correct
6 Correct 471 ms 8408 KB Output is correct
7 Correct 354 ms 8404 KB Output is correct
8 Correct 357 ms 8400 KB Output is correct

Subtask #6
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 363 ms 9036 KB Output is correct
6 Correct 412 ms 9116 KB Output is correct
7 Correct 414 ms 9044 KB Output is correct
8 Correct 366 ms 9952 KB Output is correct

Subtask #7
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 2048 KB Output is correct
2 Correct 7 ms 2048 KB Output is correct
3 Correct 7 ms 2048 KB Output is correct
4 Correct 7 ms 2048 KB Output is correct
5 Correct 6 ms 2072 KB Output is correct
6 Correct 6 ms 2048 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 3 ms 524 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 387 ms 13520 KB Output is correct
14 Correct 394 ms 13404 KB Output is correct
15 Correct 389 ms 13516 KB Output is correct
16 Correct 380 ms 13492 KB Output is correct
17 Correct 428 ms 13536 KB Output is correct
18 Correct 365 ms 13416 KB Output is correct
19 Correct 407 ms 9632 KB Output is correct
20 Correct 395 ms 9936 KB Output is correct
21 Correct 413 ms 11576 KB Output is correct
22 Correct 406 ms 10316 KB Output is correct
23 Correct 405 ms 11204 KB Output is correct
24 Correct 390 ms 11540 KB Output is correct

Subtask #8
0 / 79.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 256 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -