oj.uz

답안 #893485

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
893485 2023-12-27T05:46:03 Z vjudge1 Road Construction (JOI21_road_construction) C++17
100 / 100
 6704 ms 131272 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(a) a.begin(), a.end()
#define ff first
#define ss second
const int mod = 1e16;

struct node{
	vector<pair<int, int> > v;
};
vector<int> a;
vector<int> ALL;
int fl;
int FX, FY;
struct ST{
	int n;
	 vector<node> tree;
	ST(int sz){
		n = sz;
		tree.resize(n * 4);
		for(int i = 0;i < n * 4; i++){
			tree[i] = {};
		}
	}
	node connect(node A, node B){
		node res;
		res.v = {};
		merge(all(A.v), all(B.v), back_inserter(res.v));
		return res;
	}
	
	
	void build(int v, int vl, int vr, vector<int> &b){
		if(vl == vr){
			tree[v].v = {{b[vl], vl}};
		}else{
			int mid = (vl + vr)>>1;
			build(v<<1, vl, mid, b);
			build(v<<1|1, mid+1, vr,b);
			tree[v] = connect(tree[v<<1], tree[v<<1|1]);
		}
	}
	
	node get(int l, int r, int v, int vl, int vr){
		if(l > vr or vl > r) return {};
		if(l <= vl and r >= vr){
			return tree[v];
		}
		int mid = (vl + vr)>>1;
		return connect(get(l, r, v<<1, vl, mid), get(l, r, v<<1|1, mid+1, vr));
	}
	
	int cnt_small(int l, int r, int x, int y, int v, int vl, int vr){
		if(l > vr or vl > r) return 0LL;
		if(l <= vl and r >= vr){
			
			int it = upper_bound(all(tree[v].v), make_pair(y, mod)) - tree[v].v.begin();
			int it1 = upper_bound(all(tree[v].v), make_pair(x - 1, mod)) - tree[v].v.begin();
			if(fl){
				for(int i = it1; i < it; i++){
					int idx = tree[v].v[i].ss;
					ALL.push_back(max(abs(tree[v].v[i].ff - FY), abs(a[idx] - FX)));
				} 
			}
			return it - it1;
		}
		int mid = (vl + vr)>>1;
		return cnt_small(l, r, x, y, v<<1, vl, mid) + cnt_small(l, r, x, y, v<<1|1, mid+1, vr);
	}
	
};
int n, k;
int calc(vector<pair<int, int> > &v, int sum, ST &seg){
	int cnt = 0;
	for(int i = 1;i <= n; i++){
		int x = v[i].ff, y = v[i].ss;
		int r = i-1, l = lower_bound(all(a), x - sum) - a.begin();
		if(l > r){
			continue;
		}
		int fn = y - sum, fn1 = y + sum;
		int smaller = seg.cnt_small(l, r, fn, fn1, 1, 1, n);
		cnt = cnt + smaller;
		
	}
	return cnt;
}


signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	 cin >> n;
	cin >> k;
	vector<pair<int, int> > v(n + 1);
	v[0] = {INT_MIN, INT_MIN};
	for(int i = 1;i <= n; i++){
		cin >> v[i].ff >> v[i].ss;
		int x = v[i].ff, y = v[i].ss;
		v[i].ff = x - y;
		v[i].ss = x + y;
	}
	sort(all(v), [&](auto A, auto B){
		return A.ff < B.ff;
	});
	ST seg(n+1);
	vector<int> b(n + 1);
	a.resize(n+1);
	a[0] = INT_MIN;	
	for(int i = 1;i <= n; i++){
		b[i] = v[i].ss;
		a[i] = v[i].ff;
	}
	seg.build(1, 1, n, b);
	
	//cout << calc(v, 2, seg) << '\n';
	int l = 0, r = (int)1e10;
	while(l + 1 < r){
		int mid = (l + r)>>1;
		int CNT = calc(v, mid, seg);
		if(CNT > k) r = mid;
		else l = mid;
	}
	l = r;
	//cout << "STOP Distance  : " << l << '\n';
	fl = 1;
	for(int i = 1;i <= n; i++){
		int x = v[i].ff, y = v[i].ss;
		int rr = i-1, ll = lower_bound(all(a), x - l) - a.begin();
		if(ll > rr){
			continue;
		}
		FX = x, FY = y;
		int fn = y - l, fn1 = y + l;
		int smaller = seg.cnt_small(ll, rr, fn, fn1, 1, 1, n);
	}
	sort(all(ALL));
	while((int)ALL.size() > k) ALL.pop_back();
	for(int x : ALL) cout << x << '\n';
	
	
	return 0;
}

Compilation message

road_construction.cpp: In function 'int main()':
road_construction.cpp:137:7: warning: unused variable 'smaller' [-Wunused-variable]
  137 |   int smaller = seg.cnt_small(ll, rr, fn, fn1, 1, 1, n);
      |       ^~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 5312 KB Output is correct
2 Correct 45 ms 5312 KB Output is correct
3 Correct 35 ms 5336 KB Output is correct
4 Correct 34 ms 5412 KB Output is correct
5 Correct 40 ms 4292 KB Output is correct
6 Correct 12 ms 860 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2474 ms 123948 KB Output is correct
2 Correct 2496 ms 123884 KB Output is correct
3 Correct 32 ms 5328 KB Output is correct
4 Correct 2226 ms 126416 KB Output is correct
5 Correct 2761 ms 126676 KB Output is correct
6 Correct 2748 ms 126664 KB Output is correct
7 Correct 2544 ms 124628 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4352 ms 123624 KB Output is correct
2 Correct 4320 ms 123760 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 2500 ms 125296 KB Output is correct
5 Correct 5559 ms 125452 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4352 ms 123624 KB Output is correct
2 Correct 4320 ms 123760 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 2500 ms 125296 KB Output is correct
5 Correct 5559 ms 125452 KB Output is correct
6 Correct 4522 ms 125180 KB Output is correct
7 Correct 4434 ms 124024 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 4389 ms 124120 KB Output is correct
11 Correct 2478 ms 124980 KB Output is correct
12 Correct 5424 ms 124312 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 5312 KB Output is correct
2 Correct 45 ms 5312 KB Output is correct
3 Correct 35 ms 5336 KB Output is correct
4 Correct 34 ms 5412 KB Output is correct
5 Correct 40 ms 4292 KB Output is correct
6 Correct 12 ms 860 KB Output is correct
7 Correct 2512 ms 55096 KB Output is correct
8 Correct 2520 ms 55096 KB Output is correct
9 Correct 34 ms 5412 KB Output is correct
10 Correct 1701 ms 54332 KB Output is correct
11 Correct 1389 ms 54276 KB Output is correct
12 Correct 2025 ms 56916 KB Output is correct
13 Correct 2076 ms 55860 KB Output is correct

Subtask #6
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 5312 KB Output is correct
2 Correct 45 ms 5312 KB Output is correct
3 Correct 35 ms 5336 KB Output is correct
4 Correct 34 ms 5412 KB Output is correct
5 Correct 40 ms 4292 KB Output is correct
6 Correct 12 ms 860 KB Output is correct
7 Correct 2474 ms 123948 KB Output is correct
8 Correct 2496 ms 123884 KB Output is correct
9 Correct 32 ms 5328 KB Output is correct
10 Correct 2226 ms 126416 KB Output is correct
11 Correct 2761 ms 126676 KB Output is correct
12 Correct 2748 ms 126664 KB Output is correct
13 Correct 2544 ms 124628 KB Output is correct
14 Correct 4352 ms 123624 KB Output is correct
15 Correct 4320 ms 123760 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 2500 ms 125296 KB Output is correct
18 Correct 5559 ms 125452 KB Output is correct
19 Correct 4522 ms 125180 KB Output is correct
20 Correct 4434 ms 124024 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 4389 ms 124120 KB Output is correct
24 Correct 2478 ms 124980 KB Output is correct
25 Correct 5424 ms 124312 KB Output is correct
26 Correct 2512 ms 55096 KB Output is correct
27 Correct 2520 ms 55096 KB Output is correct
28 Correct 34 ms 5412 KB Output is correct
29 Correct 1701 ms 54332 KB Output is correct
30 Correct 1389 ms 54276 KB Output is correct
31 Correct 2025 ms 56916 KB Output is correct
32 Correct 2076 ms 55860 KB Output is correct
33 Correct 6704 ms 124964 KB Output is correct
34 Correct 6549 ms 123944 KB Output is correct
35 Correct 4800 ms 124264 KB Output is correct
36 Correct 5551 ms 131020 KB Output is correct
37 Correct 5833 ms 131272 KB Output is correct
38 Correct 6135 ms 125144 KB Output is correct