oj.uz

Submission #258860

# Submission time Handle Problem Language Result Execution time Memory
258860 2020-08-06T16:01:47 Z amoo_safar Hamburg Steak (JOI20_hamburg) C++14
21 / 100
 1949 ms 214664 KB 
// Zende bad Shoma nasime faghat !
#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'

using namespace std;

typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

const ll Mod = 1000000007LL;
const int N = 2e5 + 10;
const ll Inf = 2242545357980376863LL;
const ll Log = 30;

int n, k;
int L[N], R[N], U[N], D[N];

vector<int> uX, uY;
vector<pii> points;

void Done(){
	while((int) points.size() < k) points.pb(pii(0, 0));
	for(auto x : points) printf("%d %d\n", uX[x.F], uY[x.S]);
	exit(0);
}

int mk[N];
bool In(pii P, int id){
	return L[id] <= P.F && P.F <= R[id] && D[id] <= P.S && P.S <= U[id];
}
void On(pii P, int col){
	for(int i = 0; i < n; i++){
		if(L[i] <= P.F && P.F <= R[i] && D[i] <= P.S && P.S <= U[i] && !mk[i]) mk[i] = col;
	}
	points.pb(P);
}
void Off(int col){
	for(int i = 0; i < n; i++)
		if(mk[i] == col)
			mk[i] = 0;
	points.pop_back();
}

void Solve(int y){
	if(y == 0){
		for(int i = 0; i < n; i++)
			if(!mk[i])
				return ;
	}
	int mnx = N, mxx = -1;
	for(int i = 0; i < n; i++)
		if(!mk[i])
			mnx = min(mnx, R[i]), mxx = max(mxx, L[i]);
	if(mxx == -1){
		for(int i = 0; i < y; i++) points.pb(pii(0, 0));
		Done();
	}


	int mny = N, mxy = -1;
	for(int i = 0; i < n; i++)
		if(!mk[i])
			mny = min(mny, U[i]), mxy = max(mxy, D[i]);
	
	for(int px : {mnx, mxx}){
		for(int py : {mny, mxy}){
			On({px, py}, y);
			Solve(y - 1);
			Off(y);
		}
	}
}

const int N2 = N * 8;
vector<int> O[N2], I[N2];
void AddE(int u, int v){
	O[u].pb(v);
	I[v].pb(u);
}
void AddC(int u, int v){
	//if(u == v);
	AddE(u ^ 1, v);
	AddE(v ^ 1, u);
}
void Ban(int u, int v){
	AddC(u ^ 1, v ^ 1);
}

int mark[N2];
vector<int> top;
void DFS(int u){
	mark[u] = 1;
	for(auto adj : O[u]) if(!mark[adj]) DFS(adj);
	top.pb(u);
}

void DFS(int u, int c){
	mark[u] = c;
	for(auto adj : I[u]) if(!mark[adj]) DFS(adj, c);
}

bool isst[N];

void Main(){

	int mnx = N, mxx = -1;
	for(int i = 0; i < n; i++)
		if(!mk[i])
			mnx = min(mnx, R[i]), mxx = max(mxx, L[i]);
	int mny = N, mxy = -1;
	for(int i = 0; i < n; i++)
		if(!mk[i])
			mny = min(mny, U[i]), mxy = max(mxy, D[i]);
	
	vector<pii> po;
	vector<int> ln;
	{ // Nodes
		int st = 0;
		for(int i = mnx + 1; i < mxx; i++)
			po.pb({i, mny});	
		
		isst[st] = true;
		for(int i = st; i + 1 < (int) po.size(); i++)
			Ban(i << 1 | 1, (i + 1) << 1);
		st = po.size();
		/////////////////////
		for(int i = mnx + 1; i < mxx; i++)
			po.pb({i, mxy});

		isst[st] = true;
		for(int i = st; i + 1 < (int) po.size(); i++)
			Ban(i << 1 | 1, (i + 1) << 1);
		st = po.size();
		/////////////////////
		for(int i = mny + 1; i < mxy; i++)
			po.pb({mnx, i});	
		
		isst[st] = true;
		for(int i = st; i + 1 < (int) po.size(); i++)
			Ban(i << 1 | 1, (i + 1) << 1);
		st = po.size();
		/////////////////////
		for(int i = mny + 1; i < mxy; i++)
			po.pb({mxx, i});

		isst[st] = true;
		for(int i = st; i + 1 < (int) po.size(); i++)
			Ban(i << 1 | 1, (i + 1) << 1);
		st = po.size();
	}
	int m = po.size();
	for(int i = 0; i < m; i++) if(isst[i]) ln.pb(i);
	ln.pb(m);
	assert(ln.size() == 5);

	int fst, la;
	vector<pii> seg;
	for(int i = 0; i < n; i++){
		seg.clear();
		/*for(int j = 0; j < 4; j++){
			fst = -1; la = -1;
			for(int l = ln[j]; l < ln[j + 1]; l++){
				if(In(po[l], i)){
					la = l;
					if(fst == -1) fst = l;
				}
			}

			if(fst == -1) continue;
			seg.pb({fst, la});
		}
		*/
		// 1
		if(D[i] <= mny){
			fst = max(mnx + 1, L[i]) - (mnx + 1);
			la = min(mxx - 1, R[i]) - (mnx + 1);
			if(fst <= la) seg.pb(pii(fst + ln[0], la + ln[0]));
		}
		// 2
		if(U[i] >= mxy){
			fst = max(mnx + 1, L[i]) - (mnx + 1);
			la = min(mxx - 1, R[i]) - (mnx + 1);
			if(fst <= la) seg.pb(pii(fst + ln[1], la + ln[1]));
		}
		// 3
		if(L[i] <= mnx){
			fst = max(mny + 1, D[i]) - (mny + 1);
			la = min(mxy - 1, U[i]) - (mny + 1);
			if(fst <= la) seg.pb(pii(fst + ln[2], la + ln[2]));
		}
		// 4
		if(R[i] >= mxx){
			fst = max(mny + 1, D[i]) - (mny + 1);
			la = min(mxy - 1, U[i]) - (mny + 1);
			if(fst <= la) seg.pb(pii(fst + ln[3], la + ln[3]));
		}


		if(seg.empty() || seg.size() > 2) continue;
		if(seg.size() == 1){
			AddC(seg[0].S << 1 | 1, seg[0].S << 1 | 1);
			if(!isst[seg[0].F])
				AddC((seg[0].F - 1) << 1, (seg[0].F - 1) << 1);
		} else {
			vector<int> B[2];
			for(int j = 0; j < 2; j++){
				B[j].pb(seg[j].S << 1 | 0);
				if(!isst[seg[j].F])
					B[j].pb((seg[j].F - 1) << 1 | 1);
			}
			for(int b1 : B[0]) for(int b2 : B[1]) Ban(b1, b2);
		}
	}

	for(int i = 0; i < m + m; i++){
		if(!mark[i]) DFS(i);
	}
	reverse(all(top));
	memset(mark, 0, sizeof mark);
	int cnt = 1;
	for(auto x : top) if(!mark[x]){
		DFS(x, cnt);
		cnt ++;
	}
	vector<int> val(m, 0);
	for(int i = 0; i < m; i++)
		val[i] = (mark[i + i] < mark[i + i + 1] ? 1 : 0);

	for(int j = 0; j < 4; j++){
		for(int l = ln[j]; l < ln[j + 1]; l++){
			if(val[l]){
				points.pb(po[l]);
				break;
			}
		}
	}
	Done();
}

int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	scanf("%d%d", &n, &k);
	for(int i = 0; i < n; i++) scanf("%d%d%d%d", L + i, D + i, R + i, U + i);

	for(int i = 0; i < n; i++) uX.pb(L[i]), uY.pb(D[i]), uX.pb(R[i]), uY.pb(U[i]);
	
	sort(all(uX)); uX.resize(unique(all(uX)) - uX.begin());
	sort(all(uY)); uY.resize(unique(all(uY)) - uY.begin());

	for(int i = 0; i < n; i++){
		L[i] = lower_bound(all(uX), L[i]) - uX.begin();
		R[i] = lower_bound(all(uX), R[i]) - uX.begin();
		U[i] = lower_bound(all(uY), U[i]) - uY.begin();
		D[i] = lower_bound(all(uY), D[i]) - uY.begin();
	}

	//assert(k <= 3);

	Solve(k);
	assert(k == 4);
	Main();

	return 0;
}

/*
4 4
1 4 1 4
2 1 2 1
3 0 3 0
4 3 4 3

*/

Compilation message

hamburg.cpp: In function 'int main()':
hamburg.cpp:250:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  250 |  scanf("%d%d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~
hamburg.cpp:251:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  251 |  for(int i = 0; i < n; i++) scanf("%d%d%d%d", L + i, D + i, R + i, U + i);
      |                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 59 ms 75640 KB Output is correct
2 Correct 60 ms 75564 KB Output is correct
3 Correct 57 ms 75600 KB Output is correct
4 Correct 61 ms 75640 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 75644 KB Output is correct
2 Correct 58 ms 75640 KB Output is correct
3 Correct 55 ms 75640 KB Output is correct
4 Correct 59 ms 75768 KB Output is correct

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 75640 KB Output is correct
2 Correct 63 ms 75568 KB Output is correct
3 Correct 59 ms 75640 KB Output is correct
4 Correct 58 ms 75536 KB Output is correct
5 Correct 58 ms 75768 KB Output is correct
6 Correct 57 ms 75592 KB Output is correct
7 Correct 61 ms 75640 KB Output is correct
8 Correct 64 ms 75640 KB Output is correct
9 Correct 59 ms 75640 KB Output is correct
10 Correct 59 ms 75768 KB Output is correct
11 Correct 62 ms 75592 KB Output is correct
12 Correct 57 ms 75640 KB Output is correct

Subtask #4
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 75648 KB Output is correct
2 Correct 58 ms 75664 KB Output is correct
3 Correct 60 ms 75640 KB Output is correct
4 Correct 57 ms 75656 KB Output is correct
5 Correct 63 ms 75640 KB Output is correct
6 Correct 57 ms 75640 KB Output is correct
7 Correct 56 ms 75640 KB Output is correct
8 Correct 59 ms 75640 KB Output is correct
9 Correct 58 ms 75640 KB Output is correct
10 Correct 61 ms 75640 KB Output is correct
11 Correct 63 ms 75644 KB Output is correct
12 Correct 57 ms 75640 KB Output is correct
13 Correct 71 ms 75640 KB Output is correct
14 Correct 72 ms 82808 KB Output is correct
15 Correct 65 ms 75640 KB Output is correct
16 Correct 66 ms 75640 KB Output is correct
17 Correct 78 ms 83064 KB Output is correct
18 Correct 63 ms 75640 KB Output is correct
19 Correct 64 ms 75640 KB Output is correct
20 Correct 73 ms 83320 KB Output is correct
21 Correct 78 ms 75640 KB Output is correct
22 Correct 63 ms 75640 KB Output is correct
23 Correct 76 ms 83452 KB Output is correct
24 Correct 60 ms 75640 KB Output is correct
25 Correct 58 ms 75640 KB Output is correct
26 Correct 58 ms 75640 KB Output is correct
27 Correct 60 ms 75640 KB Output is correct
28 Correct 60 ms 75640 KB Output is correct
29 Correct 59 ms 75660 KB Output is correct
30 Correct 60 ms 75640 KB Output is correct
31 Correct 77 ms 82936 KB Output is correct
32 Correct 68 ms 82680 KB Output is correct
33 Correct 70 ms 82936 KB Output is correct
34 Correct 69 ms 82808 KB Output is correct
35 Correct 71 ms 83320 KB Output is correct
36 Correct 71 ms 82936 KB Output is correct
37 Correct 72 ms 83576 KB Output is correct
38 Correct 73 ms 83704 KB Output is correct
39 Correct 72 ms 83064 KB Output is correct
40 Correct 73 ms 82936 KB Output is correct
41 Correct 75 ms 83064 KB Output is correct
42 Correct 71 ms 83164 KB Output is correct
43 Correct 73 ms 83192 KB Output is correct
44 Correct 73 ms 83192 KB Output is correct
45 Correct 59 ms 75660 KB Output is correct
46 Correct 95 ms 83316 KB Output is correct
47 Correct 79 ms 83168 KB Output is correct
48 Correct 73 ms 83576 KB Output is correct
49 Correct 88 ms 83196 KB Output is correct
50 Correct 72 ms 83064 KB Output is correct
51 Correct 75 ms 83448 KB Output is correct
52 Correct 74 ms 82808 KB Output is correct
53 Correct 79 ms 83064 KB Output is correct
54 Correct 78 ms 83576 KB Output is correct
55 Correct 80 ms 83064 KB Output is correct
56 Correct 74 ms 83064 KB Output is correct
57 Correct 72 ms 83064 KB Output is correct
58 Correct 75 ms 83064 KB Output is correct

Subtask #5
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 59 ms 75640 KB Output is correct
2 Correct 60 ms 75564 KB Output is correct
3 Correct 57 ms 75600 KB Output is correct
4 Correct 61 ms 75640 KB Output is correct
5 Correct 414 ms 82776 KB Output is correct
6 Correct 443 ms 82804 KB Output is correct
7 Correct 434 ms 82776 KB Output is correct
8 Correct 434 ms 82812 KB Output is correct

Subtask #6
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 75644 KB Output is correct
2 Correct 58 ms 75640 KB Output is correct
3 Correct 55 ms 75640 KB Output is correct
4 Correct 59 ms 75768 KB Output is correct
5 Correct 447 ms 82732 KB Output is correct
6 Correct 459 ms 82808 KB Output is correct
7 Correct 461 ms 82796 KB Output is correct
8 Correct 453 ms 82776 KB Output is correct

Subtask #7
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 75640 KB Output is correct
2 Correct 63 ms 75568 KB Output is correct
3 Correct 59 ms 75640 KB Output is correct
4 Correct 58 ms 75536 KB Output is correct
5 Correct 58 ms 75768 KB Output is correct
6 Correct 57 ms 75592 KB Output is correct
7 Correct 61 ms 75640 KB Output is correct
8 Correct 64 ms 75640 KB Output is correct
9 Correct 59 ms 75640 KB Output is correct
10 Correct 59 ms 75768 KB Output is correct
11 Correct 62 ms 75592 KB Output is correct
12 Correct 57 ms 75640 KB Output is correct
13 Correct 476 ms 82820 KB Output is correct
14 Correct 463 ms 82776 KB Output is correct
15 Correct 503 ms 82764 KB Output is correct
16 Correct 457 ms 82804 KB Output is correct
17 Correct 452 ms 82816 KB Output is correct
18 Correct 435 ms 82768 KB Output is correct
19 Correct 460 ms 82820 KB Output is correct
20 Correct 453 ms 82812 KB Output is correct
21 Correct 621 ms 82832 KB Output is correct
22 Correct 562 ms 82820 KB Output is correct
23 Correct 542 ms 82776 KB Output is correct
24 Correct 538 ms 82812 KB Output is correct

Subtask #8
0 / 79.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 75648 KB Output is correct
2 Correct 58 ms 75664 KB Output is correct
3 Correct 60 ms 75640 KB Output is correct
4 Correct 57 ms 75656 KB Output is correct
5 Correct 63 ms 75640 KB Output is correct
6 Correct 57 ms 75640 KB Output is correct
7 Correct 56 ms 75640 KB Output is correct
8 Correct 59 ms 75640 KB Output is correct
9 Correct 58 ms 75640 KB Output is correct
10 Correct 61 ms 75640 KB Output is correct
11 Correct 63 ms 75644 KB Output is correct
12 Correct 57 ms 75640 KB Output is correct
13 Correct 71 ms 75640 KB Output is correct
14 Correct 72 ms 82808 KB Output is correct
15 Correct 65 ms 75640 KB Output is correct
16 Correct 66 ms 75640 KB Output is correct
17 Correct 78 ms 83064 KB Output is correct
18 Correct 63 ms 75640 KB Output is correct
19 Correct 64 ms 75640 KB Output is correct
20 Correct 73 ms 83320 KB Output is correct
21 Correct 78 ms 75640 KB Output is correct
22 Correct 63 ms 75640 KB Output is correct
23 Correct 76 ms 83452 KB Output is correct
24 Correct 60 ms 75640 KB Output is correct
25 Correct 58 ms 75640 KB Output is correct
26 Correct 58 ms 75640 KB Output is correct
27 Correct 60 ms 75640 KB Output is correct
28 Correct 60 ms 75640 KB Output is correct
29 Correct 59 ms 75660 KB Output is correct
30 Correct 60 ms 75640 KB Output is correct
31 Correct 77 ms 82936 KB Output is correct
32 Correct 68 ms 82680 KB Output is correct
33 Correct 70 ms 82936 KB Output is correct
34 Correct 69 ms 82808 KB Output is correct
35 Correct 71 ms 83320 KB Output is correct
36 Correct 71 ms 82936 KB Output is correct
37 Correct 72 ms 83576 KB Output is correct
38 Correct 73 ms 83704 KB Output is correct
39 Correct 72 ms 83064 KB Output is correct
40 Correct 73 ms 82936 KB Output is correct
41 Correct 75 ms 83064 KB Output is correct
42 Correct 71 ms 83164 KB Output is correct
43 Correct 73 ms 83192 KB Output is correct
44 Correct 73 ms 83192 KB Output is correct
45 Correct 59 ms 75660 KB Output is correct
46 Correct 95 ms 83316 KB Output is correct
47 Correct 79 ms 83168 KB Output is correct
48 Correct 73 ms 83576 KB Output is correct
49 Correct 88 ms 83196 KB Output is correct
50 Correct 72 ms 83064 KB Output is correct
51 Correct 75 ms 83448 KB Output is correct
52 Correct 74 ms 82808 KB Output is correct
53 Correct 79 ms 83064 KB Output is correct
54 Correct 78 ms 83576 KB Output is correct
55 Correct 80 ms 83064 KB Output is correct
56 Correct 74 ms 83064 KB Output is correct
57 Correct 72 ms 83064 KB Output is correct
58 Correct 75 ms 83064 KB Output is correct
59 Correct 484 ms 82736 KB Output is correct
60 Correct 457 ms 82716 KB Output is correct
61 Correct 431 ms 82772 KB Output is correct
62 Correct 456 ms 82720 KB Output is correct
63 Correct 461 ms 82820 KB Output is correct
64 Correct 433 ms 82884 KB Output is correct
65 Correct 621 ms 82896 KB Output is correct
66 Incorrect 1949 ms 214664 KB Output isn't correct
67 Halted 0 ms 0 KB -