oj.uz

Submission #333375

# Submission time Handle Problem Language Result Execution time Memory
333375 2020-12-05T19:20:08 Z arnold518 None (JOI14_ho_t5) C++14
10 / 100
 1325 ms 262148 KB 
#pragma GCC optimize ("O3")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
 
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
const int MAXN = 2e5;
const int MAXV = 3.9e6;
 
struct Line
{
	int x1, y1, x2, y2, p;
};
 
int W, H, N, M, SX, SY;
Line A[MAXN+10], B[MAXN+10];
 
vector<int> xcomp, ycomp;
 
ll V, E, C=1;
 
struct BIT
{
	int tree[MAXN+10];
	void update(int i, int x) { for(; i<=SY; i+=(i&-i)) tree[i]+=x; }
	int query(int i) { int ret=0; for(; i>0; i-=(i&-i)) ret+=tree[i]; return ret; }
	int query(int l, int r) { return query(r)-query(l-1); }
}bit;
 
int LC[MAXV+10], RC[MAXV+10];
 
int ncnt;
 
int newNode()
{
	if(ncnt+1==MAXV) while(1);
	return ++ncnt;
}
 
vector<int> adj[MAXV+10];
vector<int> radj[MAXN+10];
 
void addEdge(int u, int v)
{
	//printf("%d %d\n", u, v);
	if(u==-1 || v==-1) return;
	adj[u].push_back(v);
}
 
void makeTree(int node, int tl, int tr)
{
	if(tr-tl<=2) return;
	int mid=tl+tr>>1;
	LC[node]=newNode();
	RC[node]=newNode();
	addEdge(LC[node], node);
	addEdge(RC[node], node);
	makeTree(LC[node], tl, mid);
	makeTree(RC[node], mid+1, tr);
}
 
int update(int node, int tl, int tr, int p, int k)
{
	if(p<tl || tr<p) return node;
	if(tl==tr)
	{
		if(k>0) return k;
		return -1;
	}
	int ret=newNode();
	int mid=tl+tr>>1;
	LC[ret]=update(LC[node], tl, mid, p, k);
	RC[ret]=update(RC[node], mid+1, tr, p, k);
	addEdge(LC[ret], ret);
	addEdge(RC[ret], ret);
	return ret;
}
 
void query(int node, int tl, int tr, int l, int r, int k)
{
	if(r<tl || tr<l) return;
	if(l<=tl && tr<=r)
	{
		addEdge(node, k);
		radj[k].push_back(node);
		return;
	}
	int mid=tl+tr>>1;
	query(LC[node], tl, mid, l, r, k);
	query(RC[node], mid+1, tr, l, r, k);
}
 
bool vis[MAXV+10];
vector<int> S;
void dfs(int now)
{
	vis[now]=true;
	for(int nxt : adj[now])
	{
		if(vis[nxt]) continue;
		dfs(nxt);
	}
	S.push_back(now);
}
 
int scc[MAXV+10], scnt;
void dfs2(int now)
{
	scc[now]=scnt;
	if(now>N+M)
	{
		int nxt=LC[now];
		if(nxt!=-1 && !scc[nxt]) dfs2(nxt);
		nxt=RC[now];
		if(nxt!=-1 && !scc[nxt]) dfs2(nxt);
	}
	else for(int nxt : radj[now])
	{
		if(scc[nxt]) continue;
		dfs2(nxt);
	}
}
 
int main()
{
	int t;
	scanf("%d%d%d", &W, &H, &t);
	for(int i=1; i<=t; i++)
	{
		Line p;
		scanf("%d%d%d%d", &p.x1, &p.y1, &p.x2, &p.y2);
		xcomp.push_back(p.x1);
		xcomp.push_back(p.x2);
		ycomp.push_back(p.y1);
		ycomp.push_back(p.y2);
		if(p.x1==p.x2) B[++M]=p;
		else A[++N]=p;
	}
 
	xcomp.push_back(0);
	ycomp.push_back(0);
	xcomp.push_back(W);
	ycomp.push_back(H);
 
	A[++N]={0, 0, W, 0};
	A[++N]={0, H, W, H};
	B[++M]={0, 0, 0, H};
	B[++M]={W, 0, W, H};
 
	sort(xcomp.begin(), xcomp.end());
	xcomp.erase(unique(xcomp.begin(), xcomp.end()), xcomp.end());
	sort(ycomp.begin(), ycomp.end());
	ycomp.erase(unique(ycomp.begin(), ycomp.end()), ycomp.end());
 
	SX=xcomp.size(); SY=ycomp.size();
 
	for(int i=1; i<=N; i++)
	{
		A[i].x1=lower_bound(xcomp.begin(), xcomp.end(), A[i].x1)-xcomp.begin()+1;
		A[i].x2=lower_bound(xcomp.begin(), xcomp.end(), A[i].x2)-xcomp.begin()+1;
		A[i].y1=lower_bound(ycomp.begin(), ycomp.end(), A[i].y1)-ycomp.begin()+1;
		A[i].y2=lower_bound(ycomp.begin(), ycomp.end(), A[i].y2)-ycomp.begin()+1;
		A[i].p=newNode();
	}
	for(int i=1; i<=M; i++)
	{
		B[i].x1=lower_bound(xcomp.begin(), xcomp.end(), B[i].x1)-xcomp.begin()+1;
		B[i].x2=lower_bound(xcomp.begin(), xcomp.end(), B[i].x2)-xcomp.begin()+1;
		B[i].y1=lower_bound(ycomp.begin(), ycomp.end(), B[i].y1)-ycomp.begin()+1;
		B[i].y2=lower_bound(ycomp.begin(), ycomp.end(), B[i].y2)-ycomp.begin()+1;
		B[i].p=newNode();
	}
	xcomp.clear(); xcomp.shrink_to_fit();
	ycomp.clear(); ycomp.shrink_to_fit();
 
	for(int i=1; i<=N; i++)
	{
		E+=A[i].x2-A[i].x1;
		V+=A[i].x2-A[i].x1+1;
	}
	for(int i=1; i<=M; i++)
	{
		E+=B[i].y2-B[i].y1;
		V+=B[i].y2-B[i].y1+1;
	}
 
	sort(B+1, B+M+1, [&](const Line &p, const Line &q)
	{
		return p.x1<q.x1;
	});
 
	vector<pair<pll, int>> VV;
	for(int i=1; i<=N; i++)
	{
		VV.push_back({{A[i].x1, A[i].y1}, 1});
		VV.push_back({{A[i].x2+1, A[i].y1}, -1});
	}
	sort(VV.begin(), VV.end());
 
	for(int i=1, j=0; i<=M; i++)
	{
		for(; j<VV.size() && VV[j].first.first<=B[i].x1; j++)
		{
			bit.update(VV[j].first.second, VV[j].second);
		}
		V-=bit.query(B[i].y1, B[i].y2);
	}
 
	int root;
 
	VV.clear(); VV.shrink_to_fit();
	for(int i=1; i<=N; i++)
	{
		VV.push_back({{A[i].x1, A[i].y1}, A[i].p});
		VV.push_back({{A[i].x2+1, A[i].y1}, 0});
	}
	sort(VV.begin(), VV.end());
 
	root=newNode();
	makeTree(root, 1, SY);
	for(int i=1, j=0; i<=M; i++)
	{
		for(; j<VV.size() && VV[j].first.first<=B[i].x1; j++)
		{
			root=update(root, 1, SY, VV[j].first.second, VV[j].second);
			//printf("!!%d\n", VV[j].second);
		}
		query(root, 1, SY, B[i].y1, B[i].y2, B[i].p);
		//printf("??%d\n", B[i].p);
	}
 
	VV.clear(); VV.shrink_to_fit();
	for(int i=1; i<=M; i++)
	{
		VV.push_back({{B[i].y1, B[i].x1}, B[i].p});
		VV.push_back({{B[i].y2+1, B[i].x1}, 0});
	}
	sort(VV.begin(), VV.end());
	sort(A+1, A+N+1, [&](const Line &p, const Line &q)
	{
		return p.y1<q.y1;
	});

 
	root=newNode();
	makeTree(root, 1, SX);
	for(int i=1, j=0; i<=N; i++)
	{
		for(; j<VV.size() && VV[j].first.first<=A[i].y1; j++)
		{
			root=update(root, 1, SX, VV[j].first.second, VV[j].second);
		}
		query(root, 1, SX, A[i].x1, A[i].x2, A[i].p);
	}
 
	VV.clear(); VV.shrink_to_fit();
	for(int i=1; i<=N+M; i++)
	{
		if(vis[i]) continue;
		dfs(i);
	}
	reverse(S.begin(), S.end());
	for(auto it : S)
	{
		if(scc[it]) continue;
		++scnt;
		dfs2(it);
	}
	
	sort(scc+1, scc+N+M+1);
	C=unique(scc+1, scc+N+M+1)-scc-1;
 
	ll ans=C-V+E;
	printf("%lld\n", ans);
}

Compilation message

2014_ho_t5.cpp: In function 'void makeTree(int, int, int)':
2014_ho_t5.cpp:58:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   58 |  int mid=tl+tr>>1;
      |          ~~^~~
2014_ho_t5.cpp: In function 'int update(int, int, int, int, int)':
2014_ho_t5.cpp:76:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   76 |  int mid=tl+tr>>1;
      |          ~~^~~
2014_ho_t5.cpp: In function 'void query(int, int, int, int, int, int)':
2014_ho_t5.cpp:93:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   93 |  int mid=tl+tr>>1;
      |          ~~^~~
2014_ho_t5.cpp: In function 'int main()':
2014_ho_t5.cpp:207:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long long int, long long int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  207 |   for(; j<VV.size() && VV[j].first.first<=B[i].x1; j++)
      |         ~^~~~~~~~~~
2014_ho_t5.cpp:228:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long long int, long long int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  228 |   for(; j<VV.size() && VV[j].first.first<=B[i].x1; j++)
      |         ~^~~~~~~~~~
2014_ho_t5.cpp:254:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long long int, long long int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  254 |   for(; j<VV.size() && VV[j].first.first<=A[i].y1; j++)
      |         ~^~~~~~~~~~
2014_ho_t5.cpp:132:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  132 |  scanf("%d%d%d", &W, &H, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
2014_ho_t5.cpp:136:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  136 |   scanf("%d%d%d%d", &p.x1, &p.y1, &p.x2, &p.y2);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 96620 KB Output is correct
2 Correct 65 ms 96620 KB Output is correct
3 Correct 65 ms 96620 KB Output is correct
4 Correct 67 ms 96876 KB Output is correct
5 Correct 67 ms 96748 KB Output is correct
6 Correct 65 ms 96748 KB Output is correct
7 Correct 70 ms 97388 KB Output is correct
8 Correct 72 ms 98156 KB Output is correct
9 Correct 73 ms 97900 KB Output is correct
10 Correct 74 ms 98284 KB Output is correct
11 Correct 72 ms 98284 KB Output is correct
12 Correct 68 ms 97388 KB Output is correct
13 Correct 72 ms 98156 KB Output is correct
14 Correct 73 ms 97900 KB Output is correct
15 Correct 73 ms 97900 KB Output is correct
16 Correct 66 ms 96852 KB Output is correct
17 Correct 67 ms 96748 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 96620 KB Output is correct
2 Correct 65 ms 96620 KB Output is correct
3 Correct 65 ms 96620 KB Output is correct
4 Correct 67 ms 96876 KB Output is correct
5 Correct 67 ms 96748 KB Output is correct
6 Correct 65 ms 96748 KB Output is correct
7 Correct 70 ms 97388 KB Output is correct
8 Correct 72 ms 98156 KB Output is correct
9 Correct 73 ms 97900 KB Output is correct
10 Correct 74 ms 98284 KB Output is correct
11 Correct 72 ms 98284 KB Output is correct
12 Correct 68 ms 97388 KB Output is correct
13 Correct 72 ms 98156 KB Output is correct
14 Correct 73 ms 97900 KB Output is correct
15 Correct 73 ms 97900 KB Output is correct
16 Correct 66 ms 96852 KB Output is correct
17 Correct 67 ms 96748 KB Output is correct
18 Correct 66 ms 96748 KB Output is correct
19 Correct 66 ms 96748 KB Output is correct
20 Correct 67 ms 96748 KB Output is correct
21 Correct 72 ms 98284 KB Output is correct
22 Correct 72 ms 97956 KB Output is correct
23 Correct 73 ms 98284 KB Output is correct
24 Correct 73 ms 98412 KB Output is correct
25 Correct 73 ms 98284 KB Output is correct
26 Correct 71 ms 97900 KB Output is correct
27 Correct 74 ms 98284 KB Output is correct
28 Correct 73 ms 98412 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 97516 KB Output is correct
2 Correct 73 ms 97516 KB Output is correct
3 Correct 76 ms 97388 KB Output is correct
4 Correct 73 ms 98284 KB Output is correct
5 Correct 189 ms 116128 KB Output is correct
6 Correct 1004 ms 190416 KB Output is correct
7 Runtime error 1217 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
8 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 96748 KB Output is correct
2 Correct 72 ms 98412 KB Output is correct
3 Correct 205 ms 118116 KB Output is correct
4 Correct 68 ms 96620 KB Output is correct
5 Correct 72 ms 98412 KB Output is correct
6 Runtime error 1325 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
7 Halted 0 ms 0 KB -

Subtask #5
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 96620 KB Output is correct
2 Correct 65 ms 96620 KB Output is correct
3 Correct 65 ms 96620 KB Output is correct
4 Correct 67 ms 96876 KB Output is correct
5 Correct 67 ms 96748 KB Output is correct
6 Correct 65 ms 96748 KB Output is correct
7 Correct 70 ms 97388 KB Output is correct
8 Correct 72 ms 98156 KB Output is correct
9 Correct 73 ms 97900 KB Output is correct
10 Correct 74 ms 98284 KB Output is correct
11 Correct 72 ms 98284 KB Output is correct
12 Correct 68 ms 97388 KB Output is correct
13 Correct 72 ms 98156 KB Output is correct
14 Correct 73 ms 97900 KB Output is correct
15 Correct 73 ms 97900 KB Output is correct
16 Correct 66 ms 96852 KB Output is correct
17 Correct 67 ms 96748 KB Output is correct
18 Correct 66 ms 96748 KB Output is correct
19 Correct 66 ms 96748 KB Output is correct
20 Correct 67 ms 96748 KB Output is correct
21 Correct 72 ms 98284 KB Output is correct
22 Correct 72 ms 97956 KB Output is correct
23 Correct 73 ms 98284 KB Output is correct
24 Correct 73 ms 98412 KB Output is correct
25 Correct 73 ms 98284 KB Output is correct
26 Correct 71 ms 97900 KB Output is correct
27 Correct 74 ms 98284 KB Output is correct
28 Correct 73 ms 98412 KB Output is correct
29 Correct 73 ms 97516 KB Output is correct
30 Correct 73 ms 97516 KB Output is correct
31 Correct 76 ms 97388 KB Output is correct
32 Correct 73 ms 98284 KB Output is correct
33 Correct 189 ms 116128 KB Output is correct
34 Correct 1004 ms 190416 KB Output is correct
35 Runtime error 1217 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
36 Halted 0 ms 0 KB -