oj.uz

Submission #481522

# Submission time Handle Problem Language Result Execution time Memory
481522 2021-10-21T05:53:16 Z 8e7 Fountain Parks (IOI21_parks) C++17
5 / 100
 773 ms 90976 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);
	for (auto i:ed) {
		assert(i.ss.size() != 1);
	}
	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 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 363 ms 45260 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 88 ms 24128 KB Output is correct
12 Correct 21 ms 6980 KB Output is correct
13 Correct 48 ms 18880 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 365 ms 45268 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 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 363 ms 45260 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 88 ms 24128 KB Output is correct
12 Correct 21 ms 6980 KB Output is correct
13 Correct 48 ms 18880 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 365 ms 45268 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 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 363 ms 45260 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 88 ms 24128 KB Output is correct
12 Correct 21 ms 6980 KB Output is correct
13 Correct 48 ms 18880 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 365 ms 45268 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 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 363 ms 45260 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 88 ms 24128 KB Output is correct
12 Correct 21 ms 6980 KB Output is correct
13 Correct 48 ms 18880 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 365 ms 45268 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 523 ms 66132 KB Output is correct
21 Correct 708 ms 71828 KB Output is correct
22 Correct 541 ms 66008 KB Output is correct
23 Correct 589 ms 72356 KB Output is correct
24 Correct 195 ms 30816 KB Output is correct
25 Correct 423 ms 81444 KB Output is correct
26 Correct 520 ms 81412 KB Output is correct
27 Correct 772 ms 90448 KB Output is correct
28 Correct 773 ms 90652 KB Output is correct
29 Correct 599 ms 90976 KB Output is correct
30 Correct 596 ms 90972 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Incorrect 24 ms 5632 KB a[12] = 0 is not an odd integer
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 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 363 ms 45260 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 88 ms 24128 KB Output is correct
12 Correct 21 ms 6980 KB Output is correct
13 Correct 48 ms 18880 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 365 ms 45268 KB Output is correct
17 Incorrect 513 ms 81468 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 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 363 ms 45260 KB Output is correct
10 Correct 12 ms 4564 KB Output is correct
11 Correct 88 ms 24128 KB Output is correct
12 Correct 21 ms 6980 KB Output is correct
13 Correct 48 ms 18880 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 365 ms 45268 KB Output is correct
17 Incorrect 0 ms 204 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -