oj.uz

Submission #258866

# Submission time Handle Problem Language Result Execution time Memory
258866 2020-08-06T16:06:20 Z amoo_safar Hamburg Steak (JOI20_hamburg) C++14
21 / 100
 2115 ms 289928 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 * 16;
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 118 ms 150800 KB Output is correct
2 Correct 113 ms 150844 KB Output is correct
3 Correct 115 ms 150768 KB Output is correct
4 Correct 111 ms 150760 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 150800 KB Output is correct
2 Correct 119 ms 150928 KB Output is correct
3 Correct 112 ms 150804 KB Output is correct
4 Correct 110 ms 150720 KB Output is correct

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 150776 KB Output is correct
2 Correct 110 ms 150776 KB Output is correct
3 Correct 113 ms 150776 KB Output is correct
4 Correct 115 ms 150760 KB Output is correct
5 Correct 108 ms 150744 KB Output is correct
6 Correct 112 ms 150708 KB Output is correct
7 Correct 126 ms 150768 KB Output is correct
8 Correct 114 ms 150776 KB Output is correct
9 Correct 115 ms 150832 KB Output is correct
10 Correct 116 ms 150776 KB Output is correct
11 Correct 111 ms 150776 KB Output is correct
12 Correct 112 ms 150776 KB Output is correct

Subtask #4
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 115 ms 150820 KB Output is correct
2 Correct 121 ms 150776 KB Output is correct
3 Correct 113 ms 150776 KB Output is correct
4 Correct 123 ms 150728 KB Output is correct
5 Correct 115 ms 150812 KB Output is correct
6 Correct 115 ms 150788 KB Output is correct
7 Correct 126 ms 150752 KB Output is correct
8 Correct 113 ms 150764 KB Output is correct
9 Correct 121 ms 150776 KB Output is correct
10 Correct 115 ms 150776 KB Output is correct
11 Correct 128 ms 150776 KB Output is correct
12 Correct 116 ms 150868 KB Output is correct
13 Correct 131 ms 150848 KB Output is correct
14 Correct 132 ms 164272 KB Output is correct
15 Correct 126 ms 150776 KB Output is correct
16 Correct 135 ms 150824 KB Output is correct
17 Correct 136 ms 164472 KB Output is correct
18 Correct 120 ms 150904 KB Output is correct
19 Correct 124 ms 150892 KB Output is correct
20 Correct 128 ms 164692 KB Output is correct
21 Correct 121 ms 150704 KB Output is correct
22 Correct 121 ms 150756 KB Output is correct
23 Correct 130 ms 164816 KB Output is correct
24 Correct 120 ms 150712 KB Output is correct
25 Correct 113 ms 150752 KB Output is correct
26 Correct 123 ms 150776 KB Output is correct
27 Correct 116 ms 150704 KB Output is correct
28 Correct 115 ms 150752 KB Output is correct
29 Correct 111 ms 150776 KB Output is correct
30 Correct 121 ms 150776 KB Output is correct
31 Correct 132 ms 164472 KB Output is correct
32 Correct 125 ms 164088 KB Output is correct
33 Correct 128 ms 164292 KB Output is correct
34 Correct 128 ms 164344 KB Output is correct
35 Correct 136 ms 164792 KB Output is correct
36 Correct 137 ms 164200 KB Output is correct
37 Correct 135 ms 165068 KB Output is correct
38 Correct 134 ms 165112 KB Output is correct
39 Correct 135 ms 164464 KB Output is correct
40 Correct 128 ms 164344 KB Output is correct
41 Correct 131 ms 164472 KB Output is correct
42 Correct 137 ms 164472 KB Output is correct
43 Correct 141 ms 164600 KB Output is correct
44 Correct 138 ms 164600 KB Output is correct
45 Correct 120 ms 150756 KB Output is correct
46 Correct 136 ms 164728 KB Output is correct
47 Correct 137 ms 164652 KB Output is correct
48 Correct 133 ms 164984 KB Output is correct
49 Correct 134 ms 164600 KB Output is correct
50 Correct 129 ms 164472 KB Output is correct
51 Correct 127 ms 164948 KB Output is correct
52 Correct 128 ms 164344 KB Output is correct
53 Correct 134 ms 164472 KB Output is correct
54 Correct 126 ms 164888 KB Output is correct
55 Correct 140 ms 164472 KB Output is correct
56 Correct 143 ms 164472 KB Output is correct
57 Correct 132 ms 164480 KB Output is correct
58 Correct 135 ms 164472 KB Output is correct

Subtask #5
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 150800 KB Output is correct
2 Correct 113 ms 150844 KB Output is correct
3 Correct 115 ms 150768 KB Output is correct
4 Correct 111 ms 150760 KB Output is correct
5 Correct 486 ms 157908 KB Output is correct
6 Correct 514 ms 157976 KB Output is correct
7 Correct 494 ms 157960 KB Output is correct
8 Correct 476 ms 158092 KB Output is correct

Subtask #6
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 150800 KB Output is correct
2 Correct 119 ms 150928 KB Output is correct
3 Correct 112 ms 150804 KB Output is correct
4 Correct 110 ms 150720 KB Output is correct
5 Correct 487 ms 157908 KB Output is correct
6 Correct 539 ms 157912 KB Output is correct
7 Correct 554 ms 157948 KB Output is correct
8 Correct 507 ms 157904 KB Output is correct

Subtask #7
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 150776 KB Output is correct
2 Correct 110 ms 150776 KB Output is correct
3 Correct 113 ms 150776 KB Output is correct
4 Correct 115 ms 150760 KB Output is correct
5 Correct 108 ms 150744 KB Output is correct
6 Correct 112 ms 150708 KB Output is correct
7 Correct 126 ms 150768 KB Output is correct
8 Correct 114 ms 150776 KB Output is correct
9 Correct 115 ms 150832 KB Output is correct
10 Correct 116 ms 150776 KB Output is correct
11 Correct 111 ms 150776 KB Output is correct
12 Correct 112 ms 150776 KB Output is correct
13 Correct 519 ms 157976 KB Output is correct
14 Correct 514 ms 158092 KB Output is correct
15 Correct 517 ms 157972 KB Output is correct
16 Correct 490 ms 157940 KB Output is correct
17 Correct 496 ms 157912 KB Output is correct
18 Correct 486 ms 157912 KB Output is correct
19 Correct 501 ms 157964 KB Output is correct
20 Correct 528 ms 157912 KB Output is correct
21 Correct 704 ms 157904 KB Output is correct
22 Correct 612 ms 157912 KB Output is correct
23 Correct 617 ms 158076 KB Output is correct
24 Correct 583 ms 158008 KB Output is correct

Subtask #8
0 / 79.0

# Verdict Execution time Memory Grader output
1 Correct 115 ms 150820 KB Output is correct
2 Correct 121 ms 150776 KB Output is correct
3 Correct 113 ms 150776 KB Output is correct
4 Correct 123 ms 150728 KB Output is correct
5 Correct 115 ms 150812 KB Output is correct
6 Correct 115 ms 150788 KB Output is correct
7 Correct 126 ms 150752 KB Output is correct
8 Correct 113 ms 150764 KB Output is correct
9 Correct 121 ms 150776 KB Output is correct
10 Correct 115 ms 150776 KB Output is correct
11 Correct 128 ms 150776 KB Output is correct
12 Correct 116 ms 150868 KB Output is correct
13 Correct 131 ms 150848 KB Output is correct
14 Correct 132 ms 164272 KB Output is correct
15 Correct 126 ms 150776 KB Output is correct
16 Correct 135 ms 150824 KB Output is correct
17 Correct 136 ms 164472 KB Output is correct
18 Correct 120 ms 150904 KB Output is correct
19 Correct 124 ms 150892 KB Output is correct
20 Correct 128 ms 164692 KB Output is correct
21 Correct 121 ms 150704 KB Output is correct
22 Correct 121 ms 150756 KB Output is correct
23 Correct 130 ms 164816 KB Output is correct
24 Correct 120 ms 150712 KB Output is correct
25 Correct 113 ms 150752 KB Output is correct
26 Correct 123 ms 150776 KB Output is correct
27 Correct 116 ms 150704 KB Output is correct
28 Correct 115 ms 150752 KB Output is correct
29 Correct 111 ms 150776 KB Output is correct
30 Correct 121 ms 150776 KB Output is correct
31 Correct 132 ms 164472 KB Output is correct
32 Correct 125 ms 164088 KB Output is correct
33 Correct 128 ms 164292 KB Output is correct
34 Correct 128 ms 164344 KB Output is correct
35 Correct 136 ms 164792 KB Output is correct
36 Correct 137 ms 164200 KB Output is correct
37 Correct 135 ms 165068 KB Output is correct
38 Correct 134 ms 165112 KB Output is correct
39 Correct 135 ms 164464 KB Output is correct
40 Correct 128 ms 164344 KB Output is correct
41 Correct 131 ms 164472 KB Output is correct
42 Correct 137 ms 164472 KB Output is correct
43 Correct 141 ms 164600 KB Output is correct
44 Correct 138 ms 164600 KB Output is correct
45 Correct 120 ms 150756 KB Output is correct
46 Correct 136 ms 164728 KB Output is correct
47 Correct 137 ms 164652 KB Output is correct
48 Correct 133 ms 164984 KB Output is correct
49 Correct 134 ms 164600 KB Output is correct
50 Correct 129 ms 164472 KB Output is correct
51 Correct 127 ms 164948 KB Output is correct
52 Correct 128 ms 164344 KB Output is correct
53 Correct 134 ms 164472 KB Output is correct
54 Correct 126 ms 164888 KB Output is correct
55 Correct 140 ms 164472 KB Output is correct
56 Correct 143 ms 164472 KB Output is correct
57 Correct 132 ms 164480 KB Output is correct
58 Correct 135 ms 164472 KB Output is correct
59 Correct 517 ms 157972 KB Output is correct
60 Correct 518 ms 158040 KB Output is correct
61 Correct 479 ms 157912 KB Output is correct
62 Correct 498 ms 157968 KB Output is correct
63 Correct 520 ms 157872 KB Output is correct
64 Correct 504 ms 157912 KB Output is correct
65 Correct 682 ms 158032 KB Output is correct
66 Incorrect 2115 ms 289928 KB Output isn't correct
67 Halted 0 ms 0 KB -