oj.uz

답안 #828234

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
828234 2023-08-17T07:02:12 Z jlallas384 낙하산 고리들 (IOI12_rings) C++17
37 / 100
 1734 ms 207716 KB 
#include <bits/stdc++.h>
using namespace std;
 
 
 
struct ufds{
    vector<int> sz, par;
    ufds(){}
    ufds(int n): sz(n, 1), par(n){
        iota(par.begin(), par.end(), 0);
    }
    int find(int a){
        return par[a] == a ? a : par[a] = find(par[a]);
    }
    int unite(int a, int b){
        a = find(a), b = find(b);
        if(a == b) return 0;
        if(sz[a] < sz[b]) swap(a, b);
        par[b] = a;
        sz[a] += sz[b];
        return 1;
    }
};
 
set<int> ans;
vector<vector<int>> g, tree;
vector<int> deg;
int n = 0;
ufds ds;
 
int bad = 0;
int d4 = 0;
 
void Init(int N){
    assert(n == 0);
    n = N;
    g.resize(n);
    tree.resize(n);
    deg.resize(n);
    for(int i = 0; i < n; i++){
        ans.insert(i);
    }
    ds = ufds(n);
}
 
void proc(int a, int add = 1){
    if(deg[a] == 4){
        if(add){
            d4++;
            if(d4 == 2) ans = {}, bad = 1;
        }
        if(!ans.count(a)) ans = {};
        else ans = {a};
    }else if(deg[a] == 3){
        set<int> nans;
        if(ans.count(a)) nans.insert(a);
        for(int u: g[a]){
            if(ans.count(u) && !d4) nans.insert(u);
        }
        ans = nans;
    }
}
 
int CountCritical(){    
    if(bad) return 0;
    else return ans.size();
}
 
 
 
 
int cyc = 0;
 
vector<int> path;
int dfs(int v, int p, int x){
    path.push_back(v);
    if(v == x) return 1;
    for(int u: tree[v]) if(u != p){
        if(dfs(u, v, x)) return 1;
    }
    path.pop_back();
    return 0;
}
 
vector<pair<int,int>> eds;
map<int, ufds> mp;
 
void Link(int a, int b){
    int res = ds.unite(a, b);
    deg[a]++, deg[b]++;
    g[a].push_back(b);
    g[b].push_back(a);
    eds.emplace_back(a, b);
    proc(a), proc(b);
    if(cyc == 2){
        set<int> nans;
        for(int x: ans){
            int bad = 0;
            if(a != x && b != x && !mp[x].unite(a, b)){
                bad = 1;
            }
            if(!bad) nans.insert(x);
        }
        ans = nans;
        for(int x: ans){
            proc(x);
            for(int u: g[x]){
                proc(u, 0);
            }
        }
        assert(ans.size() <= 2);
    }
    if(!res){
        if(!cyc){
            dfs(a, -1, b);
            ans = {};
            for(int x: path){
                ans.insert(x);
            }
            for(int i = 0; i < n; i++){
                proc(i, 0);
            }
            cyc = 1;
        }else{
            if(cyc == 1){
                set<int> nans;
                for(int x: ans) if(deg[x] >= 3){
                    ufds f(n);
                    int tbad = 0;
                    for(auto [u, v]: eds){
                        if(u != x && v != x){
                            if(!f.unite(u, v)) tbad = 1;
                        }
                    }
                    if(!tbad) nans.insert(x), mp[x] = f;;
                }
                ans = nans;
                for(int i = 0; i < n; i++){
                    proc(i, 0);
                }
            }
            cyc = 2;
        }
    }else{
        tree[a].push_back(b);
        tree[b].push_back(a);
    }
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 3 ms 980 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 852 KB Output is correct
6 Correct 3 ms 1364 KB Output is correct
7 Correct 1 ms 852 KB Output is correct
8 Correct 2 ms 980 KB Output is correct
9 Correct 3 ms 980 KB Output is correct
10 Correct 3 ms 1108 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 513 ms 91892 KB Output is correct
2 Correct 1066 ms 116860 KB Output is correct
3 Correct 1317 ms 120404 KB Output is correct
4 Correct 1551 ms 176232 KB Output is correct
5 Correct 1515 ms 177756 KB Output is correct
6 Correct 1734 ms 207716 KB Output is correct
7 Correct 1307 ms 119232 KB Output is correct
8 Correct 1353 ms 159144 KB Output is correct
9 Correct 1419 ms 174472 KB Output is correct
10 Correct 1071 ms 172328 KB Output is correct

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 3 ms 980 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 852 KB Output is correct
6 Correct 3 ms 1364 KB Output is correct
7 Correct 1 ms 852 KB Output is correct
8 Correct 2 ms 980 KB Output is correct
9 Correct 3 ms 980 KB Output is correct
10 Correct 3 ms 1108 KB Output is correct
11 Correct 3 ms 1108 KB Output is correct
12 Correct 6 ms 2020 KB Output is correct
13 Incorrect 5 ms 1876 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 3 ms 980 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 852 KB Output is correct
6 Correct 3 ms 1364 KB Output is correct
7 Correct 1 ms 852 KB Output is correct
8 Correct 2 ms 980 KB Output is correct
9 Correct 3 ms 980 KB Output is correct
10 Correct 3 ms 1108 KB Output is correct
11 Correct 3 ms 1108 KB Output is correct
12 Correct 6 ms 2020 KB Output is correct
13 Incorrect 5 ms 1876 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 3 ms 980 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 852 KB Output is correct
6 Correct 3 ms 1364 KB Output is correct
7 Correct 1 ms 852 KB Output is correct
8 Correct 2 ms 980 KB Output is correct
9 Correct 3 ms 980 KB Output is correct
10 Correct 3 ms 1108 KB Output is correct
11 Correct 513 ms 91892 KB Output is correct
12 Correct 1066 ms 116860 KB Output is correct
13 Correct 1317 ms 120404 KB Output is correct
14 Correct 1551 ms 176232 KB Output is correct
15 Correct 1515 ms 177756 KB Output is correct
16 Correct 1734 ms 207716 KB Output is correct
17 Correct 1307 ms 119232 KB Output is correct
18 Correct 1353 ms 159144 KB Output is correct
19 Correct 1419 ms 174472 KB Output is correct
20 Correct 1071 ms 172328 KB Output is correct
21 Correct 3 ms 1108 KB Output is correct
22 Correct 6 ms 2020 KB Output is correct
23 Incorrect 5 ms 1876 KB Output isn't correct
24 Halted 0 ms 0 KB -