//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};
void setIO(string s) {
freopen((s + ".in").c_str(), "r", stdin);
freopen((s + ".out").c_str(), "w", stdout);
}
const int mxn=250005;
const ll inf=(ll)2e9+5;
int n,k;
vector<pair<int,int>> vec;
vector<int> xs,ys;
vector<vector<int>> sir;
int bit[mxn];
void update(int pos,int val){
pos++;
for(;pos<mxn;pos+=(pos&-pos)){
bit[pos]+=val;
}
}
int query(int pos){
pos++;
int ans=0;
for(;pos>0;pos-=(pos&-pos)){
ans+=bit[pos];
}
return ans;
}
bool ok(ll d){
vector<vector<pair<int,int>>> st(xs.size()),en(xs.size());
for(int i=0;i<n;i++){
int l=lower_bound(all(xs),(ll)xs[vec[i].f]-d)-xs.begin();
int r=upper_bound(all(xs),(ll)xs[vec[i].f]+d)-xs.begin()-1;
int l2=lower_bound(all(ys),(ll)ys[vec[i].s]-d)-ys.begin();
int r2=upper_bound(all(ys),(ll)ys[vec[i].s]+d)-ys.begin()-1;
if(l>0){
st[l-1].push_back({l2,r2});
}
en[vec[i].f].push_back({l2,r2});
}
int ans=0;
for(int i=0;i<(int)xs.size();i++){
for(auto v:sir[i]){
update(v,1);
}
for(auto v:st[i]){
ans-=(query(v.s)-query(v.f-1));
}
for(auto v:en[i]){
ans+=(query(v.s)-query(v.f-1));
}
}
ans-=n;
//cout<<d<<' '<<ans<<'\n';
for(int i=0;i<n;i++){
update(vec[i].s,-1);
}
return ans>=k;
}
signed main() {_
cin>>n>>k;
vec.resize(n);
for(int i=0;i<n;i++){
int x,y;
cin>>x>>y;
int xx=y+x;
int yy=y-x;
vec[i]={xx,yy};
xs.push_back(xx);
ys.push_back(yy);
}
sort(all(xs));
sort(all(ys));
xs.resize(unique(all(xs))-xs.begin());
ys.resize(unique(all(ys))-ys.begin());
sir.resize(xs.size());
for(int i=0;i<n;i++){
//cout<<vec[i].f<<' '<<vec[i].s<<'\n';
vec[i].f=lower_bound(all(xs),vec[i].f)-xs.begin();
vec[i].s=lower_bound(all(ys),vec[i].s)-ys.begin();
sir[vec[i].f].push_back(vec[i].s);
}
ll l=0,r=(ll)4e9;
while(l<r){
ll mid=(l+r)/2;
if(ok(mid)){
r=mid;
}
else{
l=mid+1;
}
}
cout<<l<<'\n';
return 0;
}
//maybe its multiset not set
//yeeorz
//laborz
Compilation message
road_construction.cpp: In function 'bool ok(long long int)':
road_construction.cpp:47:13: warning: unused variable 'r' [-Wunused-variable]
47 | int r=upper_bound(all(xs),(ll)xs[vec[i].f]+d)-xs.begin()-1;
| ^
road_construction.cpp: In function 'void setIO(std::string)':
road_construction.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
15 | freopen((s + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
road_construction.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
16 | freopen((s + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
9 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
9661 ms |
43944 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8644 ms |
42428 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8644 ms |
42428 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
9 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
9 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
