Submission #1793693
Source Code Expand
#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <string>
#include <bitset>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <algorithm>
#include <sstream>
#include <stack>
#include <iomanip>
using namespace std;
#define pb push_back
#define mp make_pair
typedef pair<int,int> pii;
typedef long long ll;
typedef double ld;
typedef vector<int> vi;
#define fi first
#define se second
#define fe first
#define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);}
#define Edg int M=0,fst[SZ],vb[SZ],nxt[SZ];void ad_de(int a,int b){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;}void adde(int a,int b){ad_de(a,b);ad_de(b,a);}
#define Edgc int M=0,fst[SZ],vb[SZ],nxt[SZ],vc[SZ];void ad_de(int a,int b,int c){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;vc[M]=c;}void adde(int a,int b,int c){ad_de(a,b,c);ad_de(b,a,c);}
#define es(x,e) (int e=fst[x];e;e=nxt[e])
#define esb(x,e,b) (int e=fst[x],b=vb[e];e;e=nxt[e],b=vb[e])
#define SZ 666666
#define SS 23333333
int n,x[SZ],y[SZ],N=0;
int M=0,fst[SS],vb[SS],nxt[SS];
void ad_de(int a,int b){if(a&&b);else return;
++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;}
void adde(int a,int b){ad_de(a,b);ad_de(b,a);}
pii px[SZ],py[SZ];
struct seg_base
{
pii ps[SZ]; int pn=0;
inline void add(pii g) {ps[++pn]=g;}
inline void sor() {sort(ps+1,ps+1+pn);}
virtual void init()=0;
virtual int qry_(int l,int r)=0;
virtual int mg(int l,int r)=0;
int qry(int l,int r,pii s)
{
int L=lower_bound(ps+1,ps+1+pn,pii(l,0))-ps,
R=lower_bound(ps+1,ps+1+pn,pii(r,1e9))-ps-1;
int p=lower_bound(ps+1,ps+1+pn,s)-ps;
if(ps[p]!=s) throw -233;
if(L<=p&&p<=R)
return mg(qry_(L,p-1),qry_(p+1,R));
throw "??";
return qry_(L,R);
}
};
struct seg_out:public seg_base
{
int M,ss[SZ];
void init()
{
M=1; while(M<=pn+2) M<<=1;
for(int i=1;i<=M+M;++i) ss[i]=++N;
for(int i=1;i<M;++i)
ad_de(ss[i+i],ss[i]),ad_de(ss[i+i+1],ss[i]);
for(int i=1;i<=pn;++i)
ad_de(ps[i].se,ss[i+M]);
}
int mg(int x,int y)
{
int s=++N;
ad_de(x,s); ad_de(y,s);
return s;
}
int qry_(int l,int r)
{
if(l>r) return ++N;
int x=++N;
for(l+=M-1,r+=M+1;l^r^1;l>>=1,r>>=1)
{
if(~l&1) ad_de(ss[l^1],x);
if(r&1) ad_de(ss[r^1],x);
}
return x;
}
}out;
struct seg_in:public seg_base
{
int M,ss[SZ];
void init()
{
M=1; while(M<=pn+2) M<<=1;
for(int i=1;i<=M+M;++i) ss[i]=++N;
for(int i=1;i<M;++i)
ad_de(ss[i],ss[i+i]),ad_de(ss[i],ss[i+i+1]);
for(int i=1;i<=pn;++i)
ad_de(ss[i+M],ps[i].se);
}
int mg(int x,int y)
{
int s=++N;
ad_de(s,x); ad_de(s,y);
return s;
}
int qry_(int l,int r)
{
if(l>r) return ++N;
int x=++N;
for(l+=M-1,r+=M+1;l^r^1;l>>=1,r>>=1)
{
if(~l&1) ad_de(x,ss[l^1]);
if(r&1) ad_de(x,ss[r^1]);
}
return x;
}
}inf;
int bl[SS],dfn[SS],low[SS],C=0,st[SS],sn=0,Z=0;
bool ins[SS];
void tj(int x)
{
dfn[x]=low[x]=++C; st[++sn]=x; ins[x]=1;
for esb(x,e,b)
{
if(!dfn[b]) tj(b),low[x]=min(low[x],low[b]);
else if(ins[b]) low[x]=min(low[x],dfn[b]);
}
if(dfn[x]!=low[x]) return;
++Z; int g=-1;
while(g!=x) g=st[sn--],ins[g]=0,bl[g]=Z;
}
bool ok(int d)
{
N=n+n; M=C=Z=0;
out.init(); inf.init();
for(int i=1;i<=n;++i)
{
ad_de(out.qry(x[i]-d,x[i]+d,pii(x[i],i*2-1)),i*2);
ad_de(i*2-1,inf.qry(x[i]-d,x[i]+d,pii(x[i],i*2)));
ad_de(out.qry(y[i]-d,y[i]+d,pii(y[i],i*2)),i*2-1);
ad_de(i*2,inf.qry(y[i]-d,y[i]+d,pii(y[i],i*2-1)));
}
for(int i=1;i<=n+n;++i)
if(!dfn[i]) tj(i);
for(int i=1;i<=N;++i) fst[i]=dfn[i]=0;
for(int i=1;i<=n;++i)
if(bl[i*2-1]==bl[i*2])
return 0;
return 1;
}
int main()
{
scanf("%d",&n);
for(int i=1;i<=n;++i)
scanf("%d%d",x+i,y+i),
px[i]=pii(x[i],i),
py[i]=pii(y[i],i);
sort(px+1,px+1+n);
sort(py+1,py+1+n);
for(int i=1;i<=n;++i)
out.add(pii(x[i],i*2-1)),
out.add(pii(y[i],i*2));
for(int i=1;i<=n;++i)
inf.add(pii(x[i],i*2)),
inf.add(pii(y[i],i*2-1));
out.sor(); inf.sor();
int l=-1,r=1e9;
while(l<r)
{
int g=(l+r+1)>>1;
if(ok(g)) l=g; else r=g-1;
}
printf("%d\n",l+1);
}
Submission Info
Submission Time
2017-11-20 19:49:19+0900
Task
F - Flags
User
fjzzq2002
Language
C++14 (GCC 5.4.1)
Score
1200
Code Size
4124 Byte
Status
AC
Exec Time
1082 ms
Memory
60928 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:155:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&n);
^
./Main.cpp:159:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
py[i]=pii(y[i],i);
^
Judge Result
Set Name
Sample
All
Score / Max Score
0 / 0
1200 / 1200
Status
Set Name
Test Cases
Sample
00_example_01.txt, 00_example_02.txt, 00_example_03.txt
All
00_example_01.txt, 00_example_02.txt, 00_example_03.txt, 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt
Case Name
Status
Exec Time
Memory
00_example_01.txt
AC
9 ms
37120 KB
00_example_02.txt
AC
9 ms
37120 KB
00_example_03.txt
AC
10 ms
37120 KB
01.txt
AC
28 ms
37376 KB
02.txt
AC
15 ms
37248 KB
03.txt
AC
11 ms
37120 KB
04.txt
AC
11 ms
37120 KB
05.txt
AC
12 ms
37120 KB
06.txt
AC
797 ms
60672 KB
07.txt
AC
771 ms
60672 KB
08.txt
AC
780 ms
60672 KB
09.txt
AC
28 ms
37376 KB
10.txt
AC
16 ms
37248 KB
11.txt
AC
11 ms
37120 KB
12.txt
AC
12 ms
37120 KB
13.txt
AC
12 ms
37120 KB
14.txt
AC
715 ms
58496 KB
15.txt
AC
724 ms
58496 KB
16.txt
AC
720 ms
58496 KB
17.txt
AC
29 ms
37376 KB
18.txt
AC
17 ms
37248 KB
19.txt
AC
867 ms
60672 KB
20.txt
AC
843 ms
60672 KB
21.txt
AC
1056 ms
60672 KB
22.txt
AC
1082 ms
60672 KB
23.txt
AC
1031 ms
60672 KB
24.txt
AC
764 ms
60928 KB
25.txt
AC
823 ms
60800 KB
26.txt
AC
849 ms
60672 KB
27.txt
AC
9 ms
37120 KB