oj.uz

Submission #569797

# Submission time Handle Problem Language Result Execution time Memory
569797 2022-05-27T20:04:17 Z definitelynotmee Parachute rings (IOI12_rings) C++
100 / 100
 2283 ms 236328 KB 
#include<bits/stdc++.h>
#define mp make_pair
#define mt make_tuple
#define all(x) x.begin(), x.end()
#define ff first
#define ss second
using namespace std;
template <typename T>
using matrix = vector<vector<T>>;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll INFL = (1LL<<62)-1;
const int INF = (1<<30)-1;
const double EPS = 1e-7;
const int MOD = 1e9 + 7;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
const int MAXN = 1e6+1;

struct UnionFind{
    bool good = 1;
    int root;
    vector<int> pai, degree;

    UnionFind(int n = 0, int start = 0){
        root = start;
        pai = vector<int>(n+1);
        iota(all(pai),0);
        degree = vector<int>(n+1);
    }
    int find (int id){
        if(pai[id] == id)
            return id;
        return pai[id] = find(pai[id]);
    }
    void onion(int a, int b){

        if(a == root || b == root)
            return;
        //cout << root << " push(" << a << ',' << b << ")\n";
        degree[a]++;
        degree[b]++;
        if(degree[a] == 3)
            good = 0;//, cout << "=>" << root << " bad " << a <<  "\n";
        if(degree[b] == 3)
            good = 0;//, cout << "=>" << root << " bad " << b <<  "\n";
        a = find(a), b = find(b);
        if(a!=b){
            pai[b] = a;
        } else {
            good = 0;//, cout << "=>" << root << " badc\n";
        }
    }
};

struct UnionFind2{
    int cycle = -1;
    int cyclect = 0;
    vector<int> pai, sizee;

    UnionFind2(int n = 0){
        pai = vector<int>(n+1);
        sizee = vector<int> (n+1,1);
        iota(all(pai),0);
    }
    int find (int id){
        if(pai[id] == id)
            return id;
        return pai[id] = find(pai[id]);
    }
    void onion(int a, int b){
        a = find(a), b = find(b);
        if(a == b){
            cycle = a;
            cyclect++;
        } else{
            sizee[a] += sizee[b];
            pai[b] = a;
        }
    }
} ufsmall;

int n;

matrix<int> g;
vector<int> cand;
vector<UnionFind> uf;

int mode = 0;
int mode2big;

void inituf(int x, int y){
    if(mode < 2)
    for(int i : g[x]){
        if(cand[i]!=-1)
            continue;
        cand[i] = uf.size();
        uf.push_back(UnionFind(n,i));
        for(int j = 0; j < n; j++){
            for(int k : g[j]){
                if(j > k)
                    continue;
                int a = j , b = k;
                if(!(a == min(x,y) && b == max(x,y)))
                    uf.back().onion(j,k);
            }
        }
    }
    if(cand[x]==-1){
        cand[x] = uf.size();
        uf.push_back(UnionFind(n,x));
        for(int j = 0; j < n; j++){
            for(int k : g[j]){
                if(j > k)
                    continue;
                int a = j , b = k;
                if(!(a == min(x,y) && b == max(x,y)))
                    uf.back().onion(j,k);
            }
        }
    }

}


void Init(int N_) {

  n = N_;
  g = matrix<int>(n+1);
  cand = vector<int>(n+1,-1);
  ufsmall = UnionFind2(n);
}

void Link(int A, int B) {
    if(mode == 3)
        return;
    g[A].push_back(B);
    g[B].push_back(A);
    if(g[A].size() == 4){
        if(mode == 2){
            mode = 3;
            return;
        }else mode2big = A, mode = 2, uf.clear(), fill(all(cand),-1), inituf(A,B);
    }
    if(g[B].size() == 4){
        if(mode == 2){
            mode = 3;
            return;
        }else mode2big = B, mode = 2, uf.clear(), fill(all(cand),-1), inituf(B,A);
    }
    if(g[A].size() == 3 && mode < 2){
        mode = 1;
        inituf(A,B);
    }
    if(g[B].size() == 3 && mode < 2){
        mode = 1;
        inituf(B,A);
    }
    if(mode == 0){
        ufsmall.onion(A,B);
        if(ufsmall.cyclect >= 2)
            mode = 3;
    }
    if(uf.size() > 20){
        mode = 3;
        return;
    }
    for(auto& i : uf){
        i.onion(A,B);
    }

}

int CountCritical() {
    if(mode == 3)
        return 0;
    if(mode == 0){
        if(ufsmall.cyclect == 0)
            return n;
        assert(ufsmall.cycle >= 0);
        return ufsmall.sizee[ufsmall.cycle];
    }
    int resp =0;
    for(auto& i : uf){
        //cout << "->" << i.root << ' ' << i.good << '\n';
        resp+=i.good;
    }

    return resp;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 3 ms 724 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 1364 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 5 ms 912 KB Output is correct
10 Correct 3 ms 852 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 380 ms 34840 KB Output is correct
2 Correct 1041 ms 68608 KB Output is correct
3 Correct 339 ms 130304 KB Output is correct
4 Correct 984 ms 66740 KB Output is correct
5 Correct 1004 ms 66732 KB Output is correct
6 Correct 982 ms 65520 KB Output is correct
7 Correct 418 ms 236328 KB Output is correct
8 Correct 2028 ms 118940 KB Output is correct
9 Correct 2283 ms 134988 KB Output is correct
10 Correct 684 ms 77688 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 3 ms 724 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 1364 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 5 ms 912 KB Output is correct
10 Correct 3 ms 852 KB Output is correct
11 Correct 6 ms 1620 KB Output is correct
12 Correct 15 ms 2668 KB Output is correct
13 Correct 7 ms 1620 KB Output is correct
14 Correct 4 ms 980 KB Output is correct
15 Correct 4 ms 1620 KB Output is correct
16 Correct 4 ms 980 KB Output is correct
17 Correct 5 ms 2516 KB Output is correct
18 Correct 7 ms 4820 KB Output is correct
19 Correct 4 ms 980 KB Output is correct
20 Correct 7 ms 1492 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 3 ms 724 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 1364 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 5 ms 912 KB Output is correct
10 Correct 3 ms 852 KB Output is correct
11 Correct 6 ms 1620 KB Output is correct
12 Correct 15 ms 2668 KB Output is correct
13 Correct 7 ms 1620 KB Output is correct
14 Correct 4 ms 980 KB Output is correct
15 Correct 4 ms 1620 KB Output is correct
16 Correct 4 ms 980 KB Output is correct
17 Correct 5 ms 2516 KB Output is correct
18 Correct 7 ms 4820 KB Output is correct
19 Correct 4 ms 980 KB Output is correct
20 Correct 7 ms 1492 KB Output is correct
21 Correct 16 ms 3092 KB Output is correct
22 Correct 26 ms 4692 KB Output is correct
23 Correct 44 ms 5920 KB Output is correct
24 Correct 35 ms 6484 KB Output is correct
25 Correct 15 ms 6868 KB Output is correct
26 Correct 40 ms 6740 KB Output is correct
27 Correct 35 ms 5512 KB Output is correct
28 Correct 40 ms 21428 KB Output is correct
29 Correct 47 ms 23608 KB Output is correct
30 Correct 50 ms 7980 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 3 ms 724 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 1364 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 5 ms 912 KB Output is correct
10 Correct 3 ms 852 KB Output is correct
11 Correct 380 ms 34840 KB Output is correct
12 Correct 1041 ms 68608 KB Output is correct
13 Correct 339 ms 130304 KB Output is correct
14 Correct 984 ms 66740 KB Output is correct
15 Correct 1004 ms 66732 KB Output is correct
16 Correct 982 ms 65520 KB Output is correct
17 Correct 418 ms 236328 KB Output is correct
18 Correct 2028 ms 118940 KB Output is correct
19 Correct 2283 ms 134988 KB Output is correct
20 Correct 684 ms 77688 KB Output is correct
21 Correct 6 ms 1620 KB Output is correct
22 Correct 15 ms 2668 KB Output is correct
23 Correct 7 ms 1620 KB Output is correct
24 Correct 4 ms 980 KB Output is correct
25 Correct 4 ms 1620 KB Output is correct
26 Correct 4 ms 980 KB Output is correct
27 Correct 5 ms 2516 KB Output is correct
28 Correct 7 ms 4820 KB Output is correct
29 Correct 4 ms 980 KB Output is correct
30 Correct 7 ms 1492 KB Output is correct
31 Correct 16 ms 3092 KB Output is correct
32 Correct 26 ms 4692 KB Output is correct
33 Correct 44 ms 5920 KB Output is correct
34 Correct 35 ms 6484 KB Output is correct
35 Correct 15 ms 6868 KB Output is correct
36 Correct 40 ms 6740 KB Output is correct
37 Correct 35 ms 5512 KB Output is correct
38 Correct 40 ms 21428 KB Output is correct
39 Correct 47 ms 23608 KB Output is correct
40 Correct 50 ms 7980 KB Output is correct
41 Correct 198 ms 29976 KB Output is correct
42 Correct 702 ms 78808 KB Output is correct
43 Correct 242 ms 62048 KB Output is correct
44 Correct 323 ms 149184 KB Output is correct
45 Correct 554 ms 104488 KB Output is correct
46 Correct 597 ms 66572 KB Output is correct
47 Correct 884 ms 68268 KB Output is correct
48 Correct 427 ms 232180 KB Output is correct
49 Correct 617 ms 71580 KB Output is correct
50 Correct 677 ms 70636 KB Output is correct
51 Correct 275 ms 53100 KB Output is correct
52 Correct 326 ms 175012 KB Output is correct
53 Correct 402 ms 231608 KB Output is correct
54 Correct 1781 ms 109652 KB Output is correct
55 Correct 840 ms 78100 KB Output is correct