oj.uz

Submission #163357

# Submission time Handle Problem Language Result Execution time Memory
163357 2019-11-12T19:58:53 Z TadijaSebez Golf (JOI17_golf) C++11
30 / 100
 3852 ms 605208 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
const int N=100050;
const int H=4*N;
const int inf=1e9+7;
struct compress
{
	vector<int> all;
	void Add(int x){ all.pb(x);}
	void Build(){ sort(all.begin(),all.end());all.erase(unique(all.begin(),all.end()),all.end());}
	int Get(int x){ return lower_bound(all.begin(),all.end(),x)-all.begin()+1;}
	int sz(){ return all.size();}
} xs,ys;
struct rec
{
	int type,x,l,r;
	rec(int t, int a, int b, int c):type(t),x(a),l(b),r(c){}
};
vector<rec> rs;
int X1[N],Y1[N],X2[N],Y2[N];
vector<pair<int,int>> Add[H],Del[H];
vector<int> fir,las;
int n,sx,sy,ex,ey;
void Build(int type)
{
	for(int i=1;i<=n;i++) Add[X1[i]].pb({Y1[i],Y2[i]}),Del[X2[i]].pb({Y1[i],Y2[i]});
    set<pair<int,int>> st;
    st.insert({1,1});st.insert({ys.sz(),ys.sz()});
    for(int x=1;x<=xs.sz();x++)
	{
        for(auto p:Del[x])
		{
			auto it=st.find(p),l=it,r=it;l--;r++;
			rs.pb(rec(type,x,l->second,r->first));
			st.erase(it);
		}
		if(sx==x)
		{
			auto r=st.lower_bound({sy,-inf}),l=r;l--;
			fir.pb(rs.size());
			rs.pb(rec(type,x,l->second,r->first));
		}
		if(ex==x)
		{
			auto r=st.lower_bound({ey,-inf}),l=r;l--;
			las.pb(rs.size());
			rs.pb(rec(type,x,l->second,r->first));
		}
		for(auto p:Add[x])
		{
			st.insert(p);
			auto it=st.find(p),l=it,r=it;l--;r++;
			rs.pb(rec(type,x,l->second,r->first));
		}
	}
	for(int i=1;i<=xs.sz();i++) Add[i].clear(),Del[i].clear();
	for(int i=1;i<=n;i++) swap(X1[i],Y1[i]),swap(X2[i],Y2[i]);swap(sx,sy);swap(ex,ey);swap(xs,ys);
}
const int M=H*2;
bool was[N];
int dist[N];
queue<int> q;
struct SegmentTree
{
	set<pair<int,int>> node[M];
	SegmentTree(){}
	void Ins(int x, int l, int r, int id)
	{
		for(l+=H,r+=H;l<=r;l>>=1,r>>=1)
		{
			if(l%2==1) node[l++].insert({x,id});
			if(r%2==0) node[r--].insert({x,id});
		}
	}
	void Take(int x, int l, int r, int d)
	{
		for(x+=H;x;x>>=1)
		{
			while(1)
			{
				auto it=node[x].lower_bound({l,-inf});
				if(it==node[x].end() || it->first>r) break;
				int id=it->second;
				node[x].erase(it);
				if(!was[id]) was[id]=1,dist[id]=d+1,q.push(id);
			}
		}
	}
} ST[2];
int main()
{
	scanf("%i %i %i %i",&sx,&sy,&ex,&ey);
	scanf("%i",&n);
	xs.Add(0);xs.Add(inf);ys.Add(0);ys.Add(inf);xs.Add(sx);xs.Add(ex);ys.Add(sy);ys.Add(ey);
	for(int i=1;i<=n;i++) scanf("%i %i %i %i",&X1[i],&X2[i],&Y1[i],&Y2[i]),xs.Add(X1[i]),xs.Add(X2[i]),ys.Add(Y1[i]),ys.Add(Y2[i]);
	xs.Build();ys.Build();
	sx=xs.Get(sx);ex=xs.Get(ex);sy=ys.Get(sy);ey=ys.Get(ey);
	for(int i=1;i<=n;i++) X1[i]=xs.Get(X1[i]),X2[i]=xs.Get(X2[i]),Y1[i]=ys.Get(Y1[i]),Y2[i]=ys.Get(Y2[i]);
	Build(0);Build(1);
	for(int i=0;i<rs.size();i++) ST[rs[i].type].Ins(rs[i].x,rs[i].l,rs[i].r,i);
	for(int i:fir)
	{
		if(rs[i].type==0)
		{
			if(ex==rs[i].x && ey>=rs[i].l && ey<=rs[i].r) return 0*printf("1\n");
		}
		else
		{
			if(ey==rs[i].x && ex>=rs[i].l && ex<=rs[i].r) return 0*printf("1\n");
		}
		q.push(i),was[i]=1;
	}
	while(q.size())
	{
		int x=q.front();
		q.pop();
		ST[rs[x].type^1].Take(rs[x].x,rs[x].l,rs[x].r,dist[x]);
	}
	int ans=1e9+7;
	for(int i:las) if(was[i]) ans=min(ans,dist[i]);
	printf("%i\n",ans+1);
	return 0;
}

Compilation message

golf.cpp: In function 'void Build(int)':
golf.cpp:59:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=1;i<=n;i++) swap(X1[i],Y1[i]),swap(X2[i],Y2[i]);swap(sx,sy);swap(ex,ey);swap(xs,ys);
  ^~~
golf.cpp:59:60: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  for(int i=1;i<=n;i++) swap(X1[i],Y1[i]),swap(X2[i],Y2[i]);swap(sx,sy);swap(ex,ey);swap(xs,ys);
                                                            ^~~~
golf.cpp: In function 'int main()':
golf.cpp:102:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<rs.size();i++) ST[rs[i].type].Ins(rs[i].x,rs[i].l,rs[i].r,i);
              ~^~~~~~~~~~
golf.cpp:94:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i %i %i",&sx,&sy,&ex,&ey);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
golf.cpp:95:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&n);
  ~~~~~^~~~~~~~~
golf.cpp:97:114: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%i %i %i %i",&X1[i],&X2[i],&Y1[i],&Y2[i]),xs.Add(X1[i]),xs.Add(X2[i]),ys.Add(Y1[i]),ys.Add(Y2[i]);
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94304 KB Output is correct
2 Correct 72 ms 94456 KB Output is correct
3 Correct 68 ms 94332 KB Output is correct
4 Correct 60 ms 94456 KB Output is correct
5 Correct 67 ms 95480 KB Output is correct
6 Correct 82 ms 95480 KB Output is correct
7 Correct 85 ms 95456 KB Output is correct
8 Correct 73 ms 95528 KB Output is correct
9 Correct 67 ms 95440 KB Output is correct
10 Correct 82 ms 95480 KB Output is correct
11 Correct 68 ms 95480 KB Output is correct
12 Correct 80 ms 95480 KB Output is correct
13 Correct 66 ms 95480 KB Output is correct
14 Correct 68 ms 95480 KB Output is correct
15 Correct 64 ms 94840 KB Output is correct
16 Correct 77 ms 95480 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94304 KB Output is correct
2 Correct 72 ms 94456 KB Output is correct
3 Correct 68 ms 94332 KB Output is correct
4 Correct 60 ms 94456 KB Output is correct
5 Correct 67 ms 95480 KB Output is correct
6 Correct 82 ms 95480 KB Output is correct
7 Correct 85 ms 95456 KB Output is correct
8 Correct 73 ms 95528 KB Output is correct
9 Correct 67 ms 95440 KB Output is correct
10 Correct 82 ms 95480 KB Output is correct
11 Correct 68 ms 95480 KB Output is correct
12 Correct 80 ms 95480 KB Output is correct
13 Correct 66 ms 95480 KB Output is correct
14 Correct 68 ms 95480 KB Output is correct
15 Correct 64 ms 94840 KB Output is correct
16 Correct 77 ms 95480 KB Output is correct
17 Correct 71 ms 95840 KB Output is correct
18 Correct 70 ms 95736 KB Output is correct
19 Correct 70 ms 95704 KB Output is correct
20 Correct 85 ms 95736 KB Output is correct
21 Correct 124 ms 95932 KB Output is correct
22 Correct 119 ms 95736 KB Output is correct
23 Correct 70 ms 95864 KB Output is correct
24 Correct 76 ms 95736 KB Output is correct
25 Correct 83 ms 95836 KB Output is correct
26 Correct 76 ms 95736 KB Output is correct
27 Correct 65 ms 94996 KB Output is correct
28 Correct 68 ms 95608 KB Output is correct
29 Correct 75 ms 95712 KB Output is correct

Subtask #3
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94304 KB Output is correct
2 Correct 72 ms 94456 KB Output is correct
3 Correct 68 ms 94332 KB Output is correct
4 Correct 60 ms 94456 KB Output is correct
5 Correct 67 ms 95480 KB Output is correct
6 Correct 82 ms 95480 KB Output is correct
7 Correct 85 ms 95456 KB Output is correct
8 Correct 73 ms 95528 KB Output is correct
9 Correct 67 ms 95440 KB Output is correct
10 Correct 82 ms 95480 KB Output is correct
11 Correct 68 ms 95480 KB Output is correct
12 Correct 80 ms 95480 KB Output is correct
13 Correct 66 ms 95480 KB Output is correct
14 Correct 68 ms 95480 KB Output is correct
15 Correct 64 ms 94840 KB Output is correct
16 Correct 77 ms 95480 KB Output is correct
17 Correct 71 ms 95840 KB Output is correct
18 Correct 70 ms 95736 KB Output is correct
19 Correct 70 ms 95704 KB Output is correct
20 Correct 85 ms 95736 KB Output is correct
21 Correct 124 ms 95932 KB Output is correct
22 Correct 119 ms 95736 KB Output is correct
23 Correct 70 ms 95864 KB Output is correct
24 Correct 76 ms 95736 KB Output is correct
25 Correct 83 ms 95836 KB Output is correct
26 Correct 76 ms 95736 KB Output is correct
27 Correct 65 ms 94996 KB Output is correct
28 Correct 68 ms 95608 KB Output is correct
29 Correct 75 ms 95712 KB Output is correct
30 Runtime error 3852 ms 605208 KB Execution killed with signal 11 (could be triggered by violating memory limits)
31 Halted 0 ms 0 KB -