# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
511015 |
2022-01-15T04:26:47 Z |
Register |
City (JOI17_city) |
C++14 |
|
178 ms |
15344 KB |
#include <bits/stdc++.h>
#include "Encoder.h"
using namespace std;
const int N=(1<<18)+10,M=1<<8;
int n,tot,dfi[N],dfo[N];
vector<int> e[N];
int sz(int x) {return dfo[x]-dfi[x]+1;}
int id(int x) {return (x-1)/M;}
void dfs1(int x,int fa){
dfi[x]=++tot;
for(int y:e[x]) if(y!=fa) dfs1(y,x);
dfo[x]=tot;
if(sz(x)>M){
int k=id(dfo[x]);
Code(x,(1<<27)+M*(k-1)*k/2+dfi[x]);
}
}
void dfs2(int x,int fa,int ri){
if(sz(x)>M) ri=id(dfo[x]);
else Code(x,(ri==id(dfo[x]))<<26|dfi[x]<<8|(sz(x)-1));
for(int y:e[x]) if(y!=fa) dfs2(y,x,ri);
}
void Encode(int nn,int u[],int v[]){
n=nn;
for(int i=0;i+1<n;i++) e[u[i]].push_back(v[i]),e[v[i]].push_back(u[i]);
dfs1(0,-1);dfs2(0,-1,0);
}
#include <bits/stdc++.h>
#include "Device.h"
using namespace std;
const int M=256;
void InitDevice(){}
int id(int x) {return (x-1)/M;}
void calc(int&b,int&d,int&k,int x){
if(x>>27&1){
b=1;x-=(1<<27);k=0;
int l=1,r=1000;
while(l<=r){
int mid=l+r>>1;
if(M*mid*(mid-1)/2<x) k=mid,l=mid+1;
else r=mid-1;
}
d=x-M*k*(k-1)/2;
}else b=0,d=(x>>8),k=x-(d<<8);
}
int Answer(long long x,long long y){
int s=x,t=y,bs,ds,ks,bt,dt,kt;
calc(bs,ds,ks,s);calc(bt,dt,kt,t);
if(bs&&bt){
if(ds<dt&&ks>=kt) return 1;
else if(dt<ds&&kt>=ks) return 0;
return 2;
}else if(!bs&&!bt){
if(ds>>26&1) ds-=(1<<26);
if(dt>>26&1) dt-=(1<<26);
int rs=ds+ks,rt=dt+kt;
if(ds<dt&&rt<=rs) return 1;
else if(dt<ds&&rs<=rt) return 0;
return 2;
}else{
bool fl=1,ri=0;
if(bt) swap(ds,dt),swap(ks,kt),fl=0;
if(dt>>26&1) ri=1,dt-=(1<<26);
if(ds>dt||ks<id(dt+kt-1)) return 2;
if(ks>id(dt+kt-1)||ri) return fl;
return 2;
}
}
Compilation message
Device.cpp: In function 'void calc(int&, int&, int&, int)':
Device.cpp:12:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
12 | int mid=l+r>>1;
| ~^~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
6780 KB |
Output is correct |
2 |
Correct |
4 ms |
6776 KB |
Output is correct |
3 |
Correct |
4 ms |
6788 KB |
Output is correct |
4 |
Correct |
4 ms |
6780 KB |
Output is correct |
5 |
Correct |
3 ms |
6784 KB |
Output is correct |
6 |
Correct |
3 ms |
6788 KB |
Output is correct |
7 |
Correct |
5 ms |
6780 KB |
Output is correct |
8 |
Correct |
4 ms |
6788 KB |
Output is correct |
9 |
Correct |
4 ms |
6788 KB |
Output is correct |
10 |
Correct |
4 ms |
6780 KB |
Output is correct |
11 |
Correct |
4 ms |
6780 KB |
Output is correct |
12 |
Correct |
3 ms |
6780 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
178 ms |
15344 KB |
Wrong Answer [6] |
2 |
Halted |
0 ms |
0 KB |
- |