oj.uz

Submission #481535

# Submission time Handle Problem Language Result Execution time Memory
481535 2021-10-21T06:16:51 Z 8e7 Fountain Parks (IOI21_parks) C++17
5 / 100
 605 ms 81452 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;
	while (true) {
		bool f = 0;
		for (auto i:ed) {
			if (i.ss.size()) que.push(i.ff), f = 1;	
		}
		if (!f) break;
		while (que.size()) {
			ll h = que.front();
			pii cur = getv(que.front());que.pop();
			if (ed[h].size() == 0) continue;
			int ans = ed[h].back();
			ed[h].clear();
			if (ax[ans]) continue;
			ax[ans] = cur.ff, ay[ans] = cur.ss;
			//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);
	for (auto i:ed) assert(i.ss.size() == 0);
	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 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 426 ms 45248 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 93 ms 24168 KB Output is correct
12 Correct 28 ms 6860 KB Output is correct
13 Correct 56 ms 19032 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 376 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 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 426 ms 45248 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 93 ms 24168 KB Output is correct
12 Correct 28 ms 6860 KB Output is correct
13 Correct 56 ms 19032 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 376 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 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 426 ms 45248 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 93 ms 24168 KB Output is correct
12 Correct 28 ms 6860 KB Output is correct
13 Correct 56 ms 19032 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 376 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 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 426 ms 45248 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 93 ms 24168 KB Output is correct
12 Correct 28 ms 6860 KB Output is correct
13 Correct 56 ms 19032 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 376 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 0 ms 204 KB Output is correct
20 Incorrect 605 ms 66876 KB a[0] = 0 is not an odd integer
21 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 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 426 ms 45248 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 93 ms 24168 KB Output is correct
12 Correct 28 ms 6860 KB Output is correct
13 Correct 56 ms 19032 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 376 ms 45264 KB Output is correct
17 Incorrect 573 ms 81452 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 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 426 ms 45248 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 93 ms 24168 KB Output is correct
12 Correct 28 ms 6860 KB Output is correct
13 Correct 56 ms 19032 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 376 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 -