oj.uz

Submission #481521

# Submission time Handle Problem Language Result Execution time Memory
481521 2021-10-21T05:52:08 Z 8e7 Fountain Parks (IOI21_parks) C++17
5 / 100
 745 ms 91104 KB 
//Challenge: Accepted
#include "parks.h"
#include <iostream>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
#include <utility>
#include <queue>
#include <vector>
#include <assert.h>
using namespace std;
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ...b) {
	cout << a << " ", debug(b ...);
};
template<class T> void pary (T l, T r) {
	while (l!= r) cout << *l << " ", l++;
	cout << endl;
};
#define ll long long
#define maxn 200005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
unordered_map<ll, vector<int> > ed;
unordered_map<int, vector<ll> > cor;
unordered_map<ll, int> mp;
struct pnt{
	int x, y, id;
	pnt(){x = y = id = 0;}
	pnt(int a, int b, int c){x = a, y = b, id = c;}
};
ll ha(pii p) {
	return ((ll)p.ff<<20) + p.ss;	
}
pii getv(ll h) {
	return {h>>20, h & ((1<<20) - 1)};
}

int par[maxn];
int find(int a) {
	return a == par[a] ? a : par[a] = find(par[a]);
}
int num = 0;
bool Union (int a, int b) {
	//debug(a, b);
	a = find(a), b = find(b);
	if (a == b) return false;
	//debug(1);
	num--;
	par[find(a)] = find(b);
	return true;
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
	int n = x.size();
	for (int i = 1;i <= n;i++) par[i] = i;
	num = n;
	vector<pnt> a;
	for (int i = 0;i < n;i++) {
		a.push_back(pnt(x[i], y[i], i+1));
		mp[ha({x[i], y[i]})] = i+1;
	}
    if (x.size() == 1) {
		build({}, {}, {}, {});
        return 1;
    }
    vector<int> u, v, ax, ay;
	int id = 0;
	for (int i = 0;i < n;i++) {
		pii p1 = {a[i].x + 2, a[i].y}, p2 = {a[i].x, a[i].y + 2};
		int v1 = mp[ha(p1)], v2 = mp[ha(p2)];
		if (v1) {
			u.push_back(a[i].id-1), v.push_back(v1-1);		
			pii h1 = {a[i].x + 1, a[i].y + 1}, h2 = {a[i].x + 1, a[i].y - 1};
			ed[ha(h1)].push_back(id), ed[ha(h2)].push_back(id);
			cor[id].push_back(ha(h1)), cor[id].push_back(ha(h2));
			id++;
		}
		if (v2) {
			u.push_back(a[i].id-1), v.push_back(v2-1);
			pii h1 = {a[i].x + 1, a[i].y + 1}, h2 = {a[i].x - 1, a[i].y + 1};
			ed[ha(h1)].push_back(id), ed[ha(h2)].push_back(id);
			cor[id].push_back(ha(h1)), cor[id].push_back(ha(h2));
			id++;
		}
	}
	//debug(111);
	if (id != n - 1) return 0;
	ax.resize(id), ay.resize(id);
	for (int i = 0;i < id;i++) ax[i] = ay[i] = 0;
	queue<ll> que;
	for (auto i:ed) {
		//debug(i.ff);
		//pary(i.ss.begin(), i.ss.end());
		if (i.ss.size() == 1) que.push(i.ff);	
	}	
	//debug(id);
	int cnt = 0;
	while (que.size()) {
		ll h = que.front();
		pii cur = getv(que.front());que.pop();
		if (ed[h].size() == 0) continue;
		cnt++;
		int ans = ed[h].back();
		
		ax[ans] = cur.ff, ay[ans] = cur.ss;
		ed[h].clear();
		//debug(cur.ff, cur.ss, ans, h);
		for (auto x:cor[ans]) {
			auto it = find(ed[x].begin(), ed[x].end(), ans);
			if (it != ed[x].end()) {
				ed[x].erase(it);
				if (ed[x].size() == 1) {
					que.push(x);
				}
			}
		}
	}
	//sort(a.begin(), a.end(), [&](pnt p, pnt q){return (p.x == q.x ? p.y < q.y : p.x < q.x);});
	//sort(b.begin(), b.end(), [&](pnt p, pnt q){return (p.x == q.x ? p.y < q.y : p.x < q.x);});
	assert(cnt == id);
	build(u, v, ax, ay);
    return 1;
}
/*
5
2 2
4 2
4 4
4 6
2 6
*/

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 351 ms 45456 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 87 ms 24148 KB Output is correct
12 Correct 19 ms 6864 KB Output is correct
13 Correct 50 ms 18984 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 345 ms 45264 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 351 ms 45456 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 87 ms 24148 KB Output is correct
12 Correct 19 ms 6864 KB Output is correct
13 Correct 50 ms 18984 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 345 ms 45264 KB Output is correct
17 Incorrect 0 ms 204 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 351 ms 45456 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 87 ms 24148 KB Output is correct
12 Correct 19 ms 6864 KB Output is correct
13 Correct 50 ms 18984 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 345 ms 45264 KB Output is correct
17 Incorrect 0 ms 204 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 351 ms 45456 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 87 ms 24148 KB Output is correct
12 Correct 19 ms 6864 KB Output is correct
13 Correct 50 ms 18984 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 345 ms 45264 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 260 KB Output is correct
20 Correct 507 ms 66124 KB Output is correct
21 Correct 678 ms 71832 KB Output is correct
22 Correct 522 ms 65856 KB Output is correct
23 Correct 574 ms 72456 KB Output is correct
24 Correct 191 ms 30820 KB Output is correct
25 Correct 427 ms 81472 KB Output is correct
26 Correct 517 ms 81416 KB Output is correct
27 Correct 745 ms 90492 KB Output is correct
28 Correct 731 ms 90448 KB Output is correct
29 Correct 605 ms 91104 KB Output is correct
30 Correct 573 ms 90992 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Runtime error 20 ms 10012 KB Execution killed with signal 6
33 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 351 ms 45456 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 87 ms 24148 KB Output is correct
12 Correct 19 ms 6864 KB Output is correct
13 Correct 50 ms 18984 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 345 ms 45264 KB Output is correct
17 Incorrect 531 ms 81504 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 351 ms 45456 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 87 ms 24148 KB Output is correct
12 Correct 19 ms 6864 KB Output is correct
13 Correct 50 ms 18984 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 345 ms 45264 KB Output is correct
17 Incorrect 0 ms 204 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -