#include <bits/stdc++.h>
using namespace std;
#define int long long
const int maxn = 250005, maxN = 1e6 + 5, INF = 2e9 + 10;
int n, k;
pair<int,int> a[maxn];
int sz;
vector<int> vals = {-(int)1e18};
int ldc(int x) {return lower_bound(vals.begin(), vals.end(), x) - vals.begin();}
int rdc(int x) {return upper_bound(vals.begin(), vals.end(), x) - vals.begin() - 1;}
struct node {
int lpt, rpt, val;
};
struct thing {
int id, dist, cnt;
bool operator < (const thing &b) const {
return dist > b.dist;
}
};
pair<int,int> b[maxn];
vector<node> seg[maxN];
void build(int id, int l, int r) {
seg[id] = {{0, 0, 0}};
if (l==r) return;
int mid = (l+r) >> 1;
build(id*2, l, mid); build(id*2+1, mid+1, r);
}
void update(int id, int l, int r, int target) {
if (r<target || target<l) return;
if (l==r) {
int val = seg[id].back().val + 1;
seg[id].push_back({0, 0, val});
return;
}
int mid = (l+r) >> 1;
update(id*2, l, mid, target);
update(id*2+1, mid+1, r, target);
int val = seg[id*2].back().val + seg[id*2+1].back().val;
seg[id].push_back({(int)seg[id*2].size() - 1, (int)seg[id*2+1].size() - 1, val});
}
int qry(int id, int pt, int l, int r, int findl, int findr) {
if (r<findl || findr<l) return 0;
if (findl<=l && r<=findr) return seg[id][pt].val;
int mid = (l+r) >> 1;
int lhs = qry(id*2, seg[id][pt].lpt, l, mid, findl, findr);
int rhs = qry(id*2+1, seg[id][pt].rpt, mid+1, r, findl, findr);
return lhs + rhs;
}
int cunt(int id, int dist) {
int L = ldc(a[id].second - dist), R = rdc(a[id].second + dist);
int val = qry(1, id, 1, sz, L, R);
int x = lower_bound(a+1, a+n+1, make_pair(a[id].first - dist, -INF)) - a - 1;
// cout << val << " " << x << endl;
val -= qry(1, x, 1, sz, L, R);
return val;
}
priority_queue<thing> pq;
signed main() {
ios::sync_with_stdio(0); cin.tie(0);
cin >> n >> k;
for (int i=1;i<=n;i++) {
int x, y;
cin >> x >> y;
a[i] = {x+y, x-y};
vals.push_back(x-y);
}
sort(a+1, a+n+1);
sort(vals.begin(), vals.end());
vals.erase(unique(vals.begin(), vals.end()), vals.end());
sz = vals.size() - 1;
build(1, 1, sz);
for (int i=1;i<=n;i++) update(1, 1, sz, ldc(a[i].second));
for (int i=2;i<=n;i++) {
b[i] = {0, 1};
int l = 1, r = INF;
int x = cunt(i, l);
// while (l < r) {
// int mid = (l+r)/2;
// if (cunt(i, mid) == b[i].second) l = mid+1;
// else r = mid;
// }
int x = cunt(i, l);
pq.push({i, l, x});
// cout << i << " " << l << " " << cunt(i, l) << endl;
}
assert(false);
int total = 0;
while (true) {
int id = pq.top().id, dist = pq.top().dist, cnt = pq.top().cnt;
pq.pop();
for (;b[id].second<cnt;b[id].second++) {
cout << dist << '\n';
total++;
if (total == k) return 0;
}
if (b[id].second == id) continue;
b[id].first = dist;
int l = dist+1, r = INF;
while (l < r) {
int mid = (l+r)/2;
if (cunt(id, mid) == b[id].second) l = mid+1;
else r = mid;
}
int x = cunt(id, l);
pq.push({id, l, x});
}
}
Compilation message
road_construction.cpp: In function 'int main()':
road_construction.cpp:89:13: error: redeclaration of 'long long int x'
89 | int x = cunt(i, l);
| ^
road_construction.cpp:83:13: note: 'long long int x' previously declared here
83 | int x = cunt(i, l);
| ^
road_construction.cpp:82:20: warning: unused variable 'r' [-Wunused-variable]
82 | int l = 1, r = INF;
| ^
