oj.uz

Submission #258863

# Submission time Handle Problem Language Result Execution time Memory
258863 2020-08-06T16:03:24 Z amoo_safar Hamburg Steak (JOI20_hamburg) C++14
21 / 100
 1954 ms 208368 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[N2];

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 58 ms 75640 KB Output is correct
2 Correct 55 ms 75640 KB Output is correct
3 Correct 58 ms 75672 KB Output is correct
4 Correct 55 ms 75544 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 75640 KB Output is correct
2 Correct 60 ms 75640 KB Output is correct
3 Correct 59 ms 75640 KB Output is correct
4 Correct 59 ms 75616 KB Output is correct

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 75640 KB Output is correct
2 Correct 62 ms 75640 KB Output is correct
3 Correct 62 ms 75576 KB Output is correct
4 Correct 65 ms 75640 KB Output is correct
5 Correct 60 ms 75640 KB Output is correct
6 Correct 57 ms 75556 KB Output is correct
7 Correct 70 ms 75640 KB Output is correct
8 Correct 62 ms 75568 KB Output is correct
9 Correct 63 ms 75548 KB Output is correct
10 Correct 63 ms 75640 KB Output is correct
11 Correct 60 ms 75640 KB Output is correct
12 Correct 64 ms 75640 KB Output is correct

Subtask #4
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 75560 KB Output is correct
2 Correct 61 ms 75644 KB Output is correct
3 Correct 59 ms 75616 KB Output is correct
4 Correct 60 ms 75640 KB Output is correct
5 Correct 59 ms 75640 KB Output is correct
6 Correct 57 ms 75572 KB Output is correct
7 Correct 58 ms 75656 KB Output is correct
8 Correct 62 ms 75640 KB Output is correct
9 Correct 68 ms 75640 KB Output is correct
10 Correct 65 ms 75660 KB Output is correct
11 Correct 64 ms 75580 KB Output is correct
12 Correct 62 ms 75652 KB Output is correct
13 Correct 69 ms 75664 KB Output is correct
14 Correct 78 ms 82808 KB Output is correct
15 Correct 73 ms 75640 KB Output is correct
16 Correct 66 ms 75640 KB Output is correct
17 Correct 85 ms 82936 KB Output is correct
18 Correct 67 ms 75640 KB Output is correct
19 Correct 78 ms 75640 KB Output is correct
20 Correct 78 ms 83448 KB Output is correct
21 Correct 64 ms 75640 KB Output is correct
22 Correct 65 ms 75640 KB Output is correct
23 Correct 77 ms 83448 KB Output is correct
24 Correct 65 ms 75644 KB Output is correct
25 Correct 69 ms 75640 KB Output is correct
26 Correct 66 ms 75640 KB Output is correct
27 Correct 66 ms 75640 KB Output is correct
28 Correct 62 ms 75644 KB Output is correct
29 Correct 64 ms 75660 KB Output is correct
30 Correct 63 ms 75640 KB Output is correct
31 Correct 75 ms 82936 KB Output is correct
32 Correct 78 ms 82680 KB Output is correct
33 Correct 76 ms 82936 KB Output is correct
34 Correct 76 ms 82808 KB Output is correct
35 Correct 84 ms 83448 KB Output is correct
36 Correct 76 ms 82808 KB Output is correct
37 Correct 82 ms 83576 KB Output is correct
38 Correct 78 ms 83664 KB Output is correct
39 Correct 75 ms 83140 KB Output is correct
40 Correct 75 ms 82936 KB Output is correct
41 Correct 83 ms 83192 KB Output is correct
42 Correct 79 ms 83064 KB Output is correct
43 Correct 76 ms 83168 KB Output is correct
44 Correct 78 ms 83192 KB Output is correct
45 Correct 64 ms 75644 KB Output is correct
46 Correct 73 ms 83320 KB Output is correct
47 Correct 80 ms 83192 KB Output is correct
48 Correct 79 ms 83576 KB Output is correct
49 Correct 72 ms 83192 KB Output is correct
50 Correct 73 ms 83088 KB Output is correct
51 Correct 79 ms 83448 KB Output is correct
52 Correct 77 ms 82808 KB Output is correct
53 Correct 75 ms 83064 KB Output is correct
54 Correct 71 ms 83576 KB Output is correct
55 Correct 81 ms 83232 KB Output is correct
56 Correct 84 ms 83064 KB Output is correct
57 Correct 83 ms 82952 KB Output is correct
58 Correct 84 ms 83084 KB Output is correct

Subtask #5
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 75640 KB Output is correct
2 Correct 55 ms 75640 KB Output is correct
3 Correct 58 ms 75672 KB Output is correct
4 Correct 55 ms 75544 KB Output is correct
5 Correct 432 ms 82884 KB Output is correct
6 Correct 419 ms 82768 KB Output is correct
7 Correct 430 ms 82812 KB Output is correct
8 Correct 439 ms 82736 KB Output is correct

Subtask #6
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 75640 KB Output is correct
2 Correct 60 ms 75640 KB Output is correct
3 Correct 59 ms 75640 KB Output is correct
4 Correct 59 ms 75616 KB Output is correct
5 Correct 437 ms 82812 KB Output is correct
6 Correct 453 ms 82772 KB Output is correct
7 Correct 434 ms 82788 KB Output is correct
8 Correct 456 ms 82792 KB Output is correct

Subtask #7
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 75640 KB Output is correct
2 Correct 62 ms 75640 KB Output is correct
3 Correct 62 ms 75576 KB Output is correct
4 Correct 65 ms 75640 KB Output is correct
5 Correct 60 ms 75640 KB Output is correct
6 Correct 57 ms 75556 KB Output is correct
7 Correct 70 ms 75640 KB Output is correct
8 Correct 62 ms 75568 KB Output is correct
9 Correct 63 ms 75548 KB Output is correct
10 Correct 63 ms 75640 KB Output is correct
11 Correct 60 ms 75640 KB Output is correct
12 Correct 64 ms 75640 KB Output is correct
13 Correct 473 ms 82804 KB Output is correct
14 Correct 456 ms 82780 KB Output is correct
15 Correct 445 ms 82792 KB Output is correct
16 Correct 464 ms 82896 KB Output is correct
17 Correct 453 ms 82900 KB Output is correct
18 Correct 433 ms 82812 KB Output is correct
19 Correct 464 ms 82900 KB Output is correct
20 Correct 468 ms 82816 KB Output is correct
21 Correct 635 ms 82804 KB Output is correct
22 Correct 542 ms 82772 KB Output is correct
23 Correct 546 ms 82900 KB Output is correct
24 Correct 541 ms 82912 KB Output is correct

Subtask #8
0 / 79.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 75560 KB Output is correct
2 Correct 61 ms 75644 KB Output is correct
3 Correct 59 ms 75616 KB Output is correct
4 Correct 60 ms 75640 KB Output is correct
5 Correct 59 ms 75640 KB Output is correct
6 Correct 57 ms 75572 KB Output is correct
7 Correct 58 ms 75656 KB Output is correct
8 Correct 62 ms 75640 KB Output is correct
9 Correct 68 ms 75640 KB Output is correct
10 Correct 65 ms 75660 KB Output is correct
11 Correct 64 ms 75580 KB Output is correct
12 Correct 62 ms 75652 KB Output is correct
13 Correct 69 ms 75664 KB Output is correct
14 Correct 78 ms 82808 KB Output is correct
15 Correct 73 ms 75640 KB Output is correct
16 Correct 66 ms 75640 KB Output is correct
17 Correct 85 ms 82936 KB Output is correct
18 Correct 67 ms 75640 KB Output is correct
19 Correct 78 ms 75640 KB Output is correct
20 Correct 78 ms 83448 KB Output is correct
21 Correct 64 ms 75640 KB Output is correct
22 Correct 65 ms 75640 KB Output is correct
23 Correct 77 ms 83448 KB Output is correct
24 Correct 65 ms 75644 KB Output is correct
25 Correct 69 ms 75640 KB Output is correct
26 Correct 66 ms 75640 KB Output is correct
27 Correct 66 ms 75640 KB Output is correct
28 Correct 62 ms 75644 KB Output is correct
29 Correct 64 ms 75660 KB Output is correct
30 Correct 63 ms 75640 KB Output is correct
31 Correct 75 ms 82936 KB Output is correct
32 Correct 78 ms 82680 KB Output is correct
33 Correct 76 ms 82936 KB Output is correct
34 Correct 76 ms 82808 KB Output is correct
35 Correct 84 ms 83448 KB Output is correct
36 Correct 76 ms 82808 KB Output is correct
37 Correct 82 ms 83576 KB Output is correct
38 Correct 78 ms 83664 KB Output is correct
39 Correct 75 ms 83140 KB Output is correct
40 Correct 75 ms 82936 KB Output is correct
41 Correct 83 ms 83192 KB Output is correct
42 Correct 79 ms 83064 KB Output is correct
43 Correct 76 ms 83168 KB Output is correct
44 Correct 78 ms 83192 KB Output is correct
45 Correct 64 ms 75644 KB Output is correct
46 Correct 73 ms 83320 KB Output is correct
47 Correct 80 ms 83192 KB Output is correct
48 Correct 79 ms 83576 KB Output is correct
49 Correct 72 ms 83192 KB Output is correct
50 Correct 73 ms 83088 KB Output is correct
51 Correct 79 ms 83448 KB Output is correct
52 Correct 77 ms 82808 KB Output is correct
53 Correct 75 ms 83064 KB Output is correct
54 Correct 71 ms 83576 KB Output is correct
55 Correct 81 ms 83232 KB Output is correct
56 Correct 84 ms 83064 KB Output is correct
57 Correct 83 ms 82952 KB Output is correct
58 Correct 84 ms 83084 KB Output is correct
59 Correct 480 ms 82808 KB Output is correct
60 Correct 448 ms 82772 KB Output is correct
61 Correct 425 ms 82768 KB Output is correct
62 Correct 461 ms 82772 KB Output is correct
63 Correct 461 ms 82904 KB Output is correct
64 Correct 432 ms 82776 KB Output is correct
65 Correct 640 ms 82908 KB Output is correct
66 Incorrect 1954 ms 208368 KB Output isn't correct
67 Halted 0 ms 0 KB -