oj.uz

Submission #1105000

# Submission time Handle Problem Language Result Execution time Memory
1105000 2024-10-25T06:30:22 Z Nonoze Parachute rings (IOI12_rings) C++17
20 / 100
 1293 ms 258008 KB 
#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define endlfl '\n' << flush
#define quit(x) return (void)(cout << x << endl)

template<typename T> void read(T& x) { cin >> x;}
template<typename T1, typename T2> void read(pair<T1, T2>& p) { read(p.first), read(p.second);}
template<typename T> void read(vector<T>& v) { for (auto& x : v) read(x); }
template<typename T1, typename T2> void read(T1& x, T2& y) { read(x), read(y); }
template<typename T1, typename T2, typename T3> void read(T1& x, T2& y, T3& z) { read(x), read(y), read(z); }
template<typename T1, typename T2, typename T3, typename T4> void read(T1& x, T2& y, T3& z, T4& zz) { read(x), read(y), read(z), read(zz); }
template<typename T> void print(vector<T>& v) { for (auto& x : v) cout << x << ' '; cout << endl; }

#define sz(x) (int)(x.size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)
#define YES cout << "YES" << endl
#define NO cout << "NO" << endl
#define QYES quit("YES")
#define QNO quit("NO")

// #define int long long
#define double long double
const int inf = numeric_limits<int>::max() / 4;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9+7, LOG=25;

int n, cnt;
vector<int> par, sz;
vector<vector<int>> contains;
vector<set<int>> adj;
set<pair<int, int>> critical;

int find(int x) {
	if (x==par[x]) return x;
	return par[x] = find(par[x]);
}

bool same(int a, int b) {
	return find(a)==find(b);
}

void merge(int a, int b) {
	a = find(a), b = find(b);
	if (a==b) return;
	if (sz[a]<sz[b]) swap(a, b);
	par[b] = a;
	sz[a] += sz[b];
	for (int i=1; i<4; i++) {
		contains[a][i] += contains[b][i];
	}
}

bool works(int a) {
	a=find(a);
	if (sz[a]<=2) return 1;
	if (contains[a][1]==2 && contains[a][3]==0) return 1;
	return 0;
}

void Init(int N_) {
	n = N_;
	cnt=n;
	par.resize(n), sz.resize(n, 1), contains.resize(n, vector<int>(4, 0));
	iota(all(par), 0);
	adj.resize(n);
	for (int i=0; i<n; i++) critical.insert({i, 1});
}

void Link(int a, int b) {
	if (critical.empty()) return;
	if (a>b) swap(a, b);
	if (same(a, b) || sz(adj[a])>=2 || sz(adj[b])>=2) {
		if (sz(adj[a])>=3 || sz(adj[b])>=3) {
			int cnta=critical.count({a, 1})||critical.count({a, 0}), cntb=critical.count({b, 1})||critical.count({b, 0});
			critical.clear();
			if (sz(adj[b])<3 && cnta) critical.insert({a, 1});
			else if (sz(adj[a])<3 && cntb) critical.insert({b, 1});
			return;
		}
		if (sz(critical)==n) {
			critical.clear();
			for (int i=0; i<n; i++) {
				if (i==a || i==b || (find(i)==find(a) && sz(adj[a])<2 && sz(adj[b])<2)) {
					critical.insert({i, 1});
				} else if (adj[a].count(i) || adj[b].count(i)) {
					critical.insert({i, 0});
				}
			}
		} else {
			set<pair<int, int>> neww;
			for (auto u: critical) {
				if (u.fi==a || u.fi==b) {
					neww.insert({u.fi, 1});
				} else if (((adj[a].count(u.fi) && sz(adj[b])<2) || (adj[b].count(u.fi) && sz(adj[a])<2))) {
					neww.insert({u.fi, 0});
				}
			}
			critical=neww;
		}
		merge(a, b);
		contains[find(a)][sz(adj[a])]--, contains[find(b)][sz(adj[b])]--;
		adj[a].insert(b), adj[b].insert(a);
		contains[find(a)][sz(adj[a])]++, contains[find(a)][sz(adj[b])]++;
		return;
	}
	merge(a, b);
	contains[find(a)][sz(adj[a])]--;
	contains[find(b)][sz(adj[b])]--;
	adj[a].insert(b), adj[b].insert(a);
	contains[find(a)][sz(adj[a])]++;
	contains[find(b)][sz(adj[b])]++;
}

int CountCritical() {
	return sz(critical);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 3 ms 1104 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 1 ms 708 KB Output is correct
5 Correct 2 ms 1104 KB Output is correct
6 Correct 4 ms 1616 KB Output is correct
7 Correct 2 ms 1104 KB Output is correct
8 Correct 3 ms 1360 KB Output is correct
9 Correct 4 ms 1360 KB Output is correct
10 Correct 5 ms 1360 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 524 ms 133960 KB Output is correct
2 Correct 881 ms 168472 KB Output is correct
3 Correct 400 ms 167468 KB Output is correct
4 Correct 1255 ms 258008 KB Output is correct
5 Correct 1291 ms 252744 KB Output is correct
6 Correct 1293 ms 246536 KB Output is correct
7 Correct 363 ms 157768 KB Output is correct
8 Correct 1045 ms 206716 KB Output is correct
9 Incorrect 1078 ms 234560 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 3 ms 1104 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 1 ms 708 KB Output is correct
5 Correct 2 ms 1104 KB Output is correct
6 Correct 4 ms 1616 KB Output is correct
7 Correct 2 ms 1104 KB Output is correct
8 Correct 3 ms 1360 KB Output is correct
9 Correct 4 ms 1360 KB Output is correct
10 Correct 5 ms 1360 KB Output is correct
11 Incorrect 3 ms 1360 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 3 ms 1104 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 1 ms 708 KB Output is correct
5 Correct 2 ms 1104 KB Output is correct
6 Correct 4 ms 1616 KB Output is correct
7 Correct 2 ms 1104 KB Output is correct
8 Correct 3 ms 1360 KB Output is correct
9 Correct 4 ms 1360 KB Output is correct
10 Correct 5 ms 1360 KB Output is correct
11 Incorrect 3 ms 1360 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 3 ms 1104 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 1 ms 708 KB Output is correct
5 Correct 2 ms 1104 KB Output is correct
6 Correct 4 ms 1616 KB Output is correct
7 Correct 2 ms 1104 KB Output is correct
8 Correct 3 ms 1360 KB Output is correct
9 Correct 4 ms 1360 KB Output is correct
10 Correct 5 ms 1360 KB Output is correct
11 Correct 524 ms 133960 KB Output is correct
12 Correct 881 ms 168472 KB Output is correct
13 Correct 400 ms 167468 KB Output is correct
14 Correct 1255 ms 258008 KB Output is correct
15 Correct 1291 ms 252744 KB Output is correct
16 Correct 1293 ms 246536 KB Output is correct
17 Correct 363 ms 157768 KB Output is correct
18 Correct 1045 ms 206716 KB Output is correct
19 Incorrect 1078 ms 234560 KB Output isn't correct
20 Halted 0 ms 0 KB -