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Submission #481685

# Submission time Handle Problem Language Result Execution time Memory
481685 2021-10-21T11:00:35 Z Haruto810198 Parachute rings (IOI12_rings) C++17
38 / 100
 4000 ms 262148 KB 
#include <bits/stdc++.h>

using namespace std;

//#define int long long
#define double long double

#define FOR(i, l, r, d) for(int i=(l); i<=(r); i+=(d))
#define szof(x) ((int)(x).size())

#define vi vector<int>
#define pii pair<int, int>

#define F first
#define S second

#define pb push_back
#define eb emplace_back
#define mkp make_pair

const int MAX = 1000010;

int n;
vi check_id;

struct Graph{
    vi edge[MAX];
    int deg[MAX];
    int p[MAX], sz[MAX];
    int cyc, cyclen, deg3;

    void init(){
        FOR(i, 0, n-1, 1){
            edge[i].clear();
            deg[i] = 0;
            p[i] = i;
            sz[i] = 1;
        }
        cyc = 0;
        cyclen = 0;
        deg3 = 0;
    }

    int findp(int v){
        if(v == p[v]) return v;
        return p[v] = findp(p[v]);
    }

    bool uni(int u, int v){
        int pu = findp(u);
        int pv = findp(v);
        if(pu == pv) return 0;
        if(sz[pu] > sz[pv]){
            p[pv] = pu;
            sz[pu] += sz[pv];
        }
        else{
            p[pu] = pv;
            sz[pv] += sz[pu];
        }
        return 1;
    }

    void add_edge(int u, int v){
        edge[u].pb(v);
        edge[v].pb(u);
        deg[u]++;
        deg[v]++;
        if(deg[u] == 3) deg3++;
        if(deg[v] == 3) deg3++;
        if(!uni(u, v) and deg3 == 0){
            cyc++;
            cyclen = sz[findp(u)];
        }
    }
};

Graph G_now, G_check[4];

void Init(int N){
    n = N;
    G_now.init();
}

void Link(int u, int v){

    if(G_now.deg3 == 0){
        G_now.add_edge(u, v);

        if(G_now.deg3 > 0){
            if(G_now.deg[u] < G_now.deg[v]) swap(u, v);
            check_id = G_now.edge[u];
            check_id.pb(u);

            FOR(i, 0, 3, 1){
                G_check[i].init();
                FOR(uu, 0, n-1, 1){
                    if(uu == check_id[i]) continue;
                    for(int vv : G_now.edge[uu]){
                        if(vv == check_id[i] or uu < vv) continue;
                        G_check[i].add_edge(uu, vv);
                    }
                }
            }

            FOR(i, 0, n-1, 1){
                G_now.edge[i].clear();
            }
        }

        return;
    }

    if(G_now.deg3 > 0){
        FOR(i, 0, 3, 1){
            if(u != check_id[i] and v != check_id[i]){
                G_check[i].add_edge(u, v);
            }
        }
    }

}

int CountCritical(){
    if(G_now.deg3 == 0){
        if(G_now.cyc == 0) return n;
        else if(G_now.cyc == 1) return G_now.cyclen;
        else return 0;
    }
    else{
        int ret = 0;
        FOR(i, 0, 3, 1){
            if(G_check[i].cyc == 0 and G_check[i].deg3 == 0) ret++;
            else{
                FOR(j, 0, n-1, 1){
                    G_check[i].edge[j].clear();
                }
            }
        }
        return ret;
    }
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 117716 KB Output is correct
2 Correct 56 ms 118596 KB Output is correct
3 Correct 58 ms 118784 KB Output is correct
4 Correct 52 ms 117712 KB Output is correct
5 Correct 54 ms 117892 KB Output is correct
6 Correct 56 ms 117956 KB Output is correct
7 Correct 53 ms 118312 KB Output is correct
8 Correct 53 ms 117872 KB Output is correct
9 Correct 56 ms 118740 KB Output is correct
10 Correct 56 ms 118852 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 385 ms 140144 KB Output is correct
2 Runtime error 1193 ms 262148 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 117716 KB Output is correct
2 Correct 56 ms 118596 KB Output is correct
3 Correct 58 ms 118784 KB Output is correct
4 Correct 52 ms 117712 KB Output is correct
5 Correct 54 ms 117892 KB Output is correct
6 Correct 56 ms 117956 KB Output is correct
7 Correct 53 ms 118312 KB Output is correct
8 Correct 53 ms 117872 KB Output is correct
9 Correct 56 ms 118740 KB Output is correct
10 Correct 56 ms 118852 KB Output is correct
11 Correct 56 ms 118820 KB Output is correct
12 Correct 61 ms 119908 KB Output is correct
13 Correct 63 ms 119812 KB Output is correct
14 Correct 60 ms 119112 KB Output is correct
15 Correct 64 ms 119364 KB Output is correct
16 Correct 55 ms 118236 KB Output is correct
17 Correct 63 ms 119692 KB Output is correct
18 Correct 67 ms 120616 KB Output is correct
19 Correct 55 ms 118212 KB Output is correct
20 Correct 61 ms 119952 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 117716 KB Output is correct
2 Correct 56 ms 118596 KB Output is correct
3 Correct 58 ms 118784 KB Output is correct
4 Correct 52 ms 117712 KB Output is correct
5 Correct 54 ms 117892 KB Output is correct
6 Correct 56 ms 117956 KB Output is correct
7 Correct 53 ms 118312 KB Output is correct
8 Correct 53 ms 117872 KB Output is correct
9 Correct 56 ms 118740 KB Output is correct
10 Correct 56 ms 118852 KB Output is correct
11 Correct 56 ms 118820 KB Output is correct
12 Correct 61 ms 119908 KB Output is correct
13 Correct 63 ms 119812 KB Output is correct
14 Correct 60 ms 119112 KB Output is correct
15 Correct 64 ms 119364 KB Output is correct
16 Correct 55 ms 118236 KB Output is correct
17 Correct 63 ms 119692 KB Output is correct
18 Correct 67 ms 120616 KB Output is correct
19 Correct 55 ms 118212 KB Output is correct
20 Correct 61 ms 119952 KB Output is correct
21 Correct 67 ms 119392 KB Output is correct
22 Correct 84 ms 120244 KB Output is correct
23 Correct 82 ms 121180 KB Output is correct
24 Execution timed out 4099 ms 126828 KB Time limit exceeded
25 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 117716 KB Output is correct
2 Correct 56 ms 118596 KB Output is correct
3 Correct 58 ms 118784 KB Output is correct
4 Correct 52 ms 117712 KB Output is correct
5 Correct 54 ms 117892 KB Output is correct
6 Correct 56 ms 117956 KB Output is correct
7 Correct 53 ms 118312 KB Output is correct
8 Correct 53 ms 117872 KB Output is correct
9 Correct 56 ms 118740 KB Output is correct
10 Correct 56 ms 118852 KB Output is correct
11 Correct 385 ms 140144 KB Output is correct
12 Runtime error 1193 ms 262148 KB Execution killed with signal 9
13 Halted 0 ms 0 KB -