이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
const int N = 25e4 + 5;
int n, k;
int s[N], pos[N];
array<long long, 2> pt[N];
vector<long long> comp;
void upd(int i, int x) {
for (; i <= comp.size(); i += i & -i) {
s[i] += x;
}
}
long long qry(int i) {
int res = 0;
for (; i; i -= i & -i) {
res += s[i];
}
return res;
}
void clear() {
fill(s + 1, s + comp.size() + 1, 0);
}
long long count(long long d) {
clear();
long long cnt = 0;
for (int i = 1, j = 1; i <= n; ++i) {
while (pt[i][0] - pt[j][0] > d) {
upd(pos[j], -1);
++j;
}
int l = lower_bound(comp.begin(), comp.end(), pt[i][1] - d) - comp.begin();
int r = upper_bound(comp.begin(), comp.end(), pt[i][1] + d) - comp.begin();
cnt += qry(r) - qry(l);
upd(pos[i], 1);
}
return cnt;
}
vector<long long> get(long long d) {
vector<long long> res;
set<array<long long, 2>> st;
for (int i = 1, j = 1; i <= n; ++i) {
while (pt[i][0] - pt[j][0] > d) {
st.erase({pt[j][1], pt[j][0]});
++j;
}
for (auto it = st.lower_bound({pt[i][1] - d, pt[i][0] - d}); it != st.end() && (*it)[0] <= pt[i][1] + d; ++it) {
res.push_back(max(abs(pt[i][1] - (*it)[0]), pt[i][0] - (*it)[1]));
}
st.insert({pt[i][1], pt[i][0]});
}
sort(res.begin(), res.end());
return res;
}
int main() {
ios::sync_with_stdio(false); cin.tie(nullptr);
cin >> n >> k;
for (int i = 1; i <= n; ++i) {
int x, y; cin >> x >> y;
pt[i] = {x + y, x - y};
comp.push_back(pt[i][1]);
}
sort(comp.begin(), comp.end());
comp.erase(unique(comp.begin(), comp.end()), comp.end());
sort(pt + 1, pt + n + 1);
for (int i = 1; i <= n; ++i) {
pos[i] = lower_bound(comp.begin(), comp.end(), pt[i][1]) - comp.begin() + 1;
}
long long L = 1, R = 4e9, p = R;
while (L <= R) {
long long md = (L + R) / 2;
if (count(md) >= k) {
p = md;
R = md - 1;
} else {
L = md + 1;
}
}
auto res = get(p - 1);
while (res.size() < k) {
res.push_back(p);
}
for (auto x : res) {
cout << x << "\n";
}
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
road_construction.cpp: In function 'void upd(int, int)':
road_construction.cpp:19:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
19 | for (; i <= comp.size(); i += i & -i) {
| ~~^~~~~~~~~~~~~~
road_construction.cpp: In function 'int main()':
road_construction.cpp:95:21: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
95 | while (res.size() < k) {
| ~~~~~~~~~~~^~~
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