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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#122430#5463. Range Closest Pair of Points QueryfansizheWA 197ms21576kbC++231.7kb2023-07-10 15:00:322023-07-10 15:00:33

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-07-10 15:00:33]
  • 评测
  • 测评结果:WA
  • 用时:197ms
  • 内存:21576kb
  • [2023-07-10 15:00:32]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define ll long long
const double eps=1e-6;
int n,q,B;
struct node{
	long double x,y;
	int id;
	bool operator <(const node &b)const{
		if(abs(x-b.x)>eps)return x<b.x;
		else return y<b.y;
	}
}a[250005];
int b[250005];
int pos[250005],L[505],R[505];
vector<pair<int,int> > Query[250005];
ll ans[250005];
ll val[250005],mn[505];
ll getdis(long double x,long double y){return (ll)round(x*x+y*y);}
void init(){
	for(int i=1;i<=n;i++)val[i]=0x3f3f3f3f3f3f3f3f;
	for(int i=1;i<=pos[n];i++)mn[i]=0x3f3f3f3f3f3f3f3f;
}
void add(int x,ll y){
	val[x]=min(val[x],y);
	mn[pos[x]]=min(mn[pos[x]],y);
}
ll ask(int l,int r){
	ll res=0x3f3f3f3f3f3f3f3f;
	if(pos[l]==pos[r])for(int i=l;i<=r;i++)res=min(res,val[i]);
	else{
		for(int i=pos[l]+1;i<pos[r];i++)res=min(res,mn[i]);
		for(int i=l;i<=R[pos[l]];i++)res=min(res,val[i]);
		for(int i=L[pos[r]];i<=r;i++)res=min(res,val[i]);
	}
	return res;
}
int main(){
	srand(time(NULL)); 
	scanf("%d%d",&n,&q);B=sqrt(n);
	long double cs=1.0*rand()/RAND_MAX,sn=sqrt(1-cs*cs);
	for(int i=1;i<=n;i++){
		long double x,y;
		scanf("%LF%LF",&x,&y);
		a[i].x=x*cs-y*sn,a[i].y=x*sn+y*cs;
		a[i].id=i;
	}
	sort(a+1,a+n+1);
	for(int i=1;i<=n;i++){
		b[a[i].id]=i;
		pos[i]=(i-1)/B+1;
		if(!L[pos[i]])L[pos[i]]=i;
		R[pos[i]]=i;
	}
	for(int i=1;i<=q;i++){
		int l,r;scanf("%d%d",&l,&r);
		Query[r].push_back(make_pair(l,i));
	}
	init();
	for(int i=1;i<=n;i++){
		for(int j=max(1,b[i]-1000);j<b[i];j++)add(a[j].id,getdis(a[j].x-a[b[i]].x,a[j].y-a[b[i]].y));
		for(auto p:Query[i])ans[p.second]=ask(p.first,i);
	}
	for(int i=1;i<=q;i++)printf("%lld\n",ans[i]);
	return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 3ms
memory: 16184kb

input:

5 5
2 4
1 1
3 3
5 1
4 2
1 5
2 3
2 4
3 5
1 3

output:

2
8
8
2
2

result:

ok 5 number(s): "2 8 8 2 2"

Test #2:

score: 0
Accepted
time: 3ms
memory: 15992kb

input:

2 1
1 1
1 1
1 2

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 3ms
memory: 14008kb

input:

2 1
1 100000000
100000000 1
1 2

output:

19999999600000002

result:

ok 1 number(s): "19999999600000002"

Test #4:

score: -100
Wrong Answer
time: 197ms
memory: 21576kb

input:

20000 250000
3 10
5 4
4 7
1 5
2 1
10 6
2 3
8 4
2 1
8 5
9 8
7 7
4 5
2 7
9 4
9 10
3 2
9 5
10 2
9 2
3 1
9 9
6 5
9 5
9 10
9 1
1 2
8 8
3 4
7 6
6 2
6 8
6 6
8 4
10 2
1 1
10 2
8 3
4 4
5 5
5 1
4 9
7 6
6 8
6 4
1 6
10 3
3 2
4 10
6 8
9 7
2 10
7 8
10 7
3 2
5 1
6 4
7 9
1 3
4 9
4 8
9 4
5 2
2 2
9 2
9 2
9 6
6 9
8 7
...

output:

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
...

result:

wrong answer 423rd numbers differ - expected: '1', found: '0'