oj.uz

답안 #488026

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
488026 2021-11-17T12:43:22 Z SlavicG 슈퍼트리 잇기 (IOI20_supertrees) C++17
11 / 100
 211 ms 26168 KB 
#include "supertrees.h"
#include "bits/stdc++.h"
using namespace std;
 
#define ll long long
 
#define       forn(i,n)              for(int i=0;i<n;i++)
#define          all(v)              v.begin(), v.end()
#define         rall(v)              v.rbegin(),v.rend()
 
#define            pb                push_back
#define          sz(a)               (int)a.size()
 
struct DSU{
    int n;
    vector<int> par, s;
 
    DSU(int N){
        n = N;
        s.assign(n, 1), par.resize(n);
        iota(all(par), 0);
    }
 
    int get(int a){
        return par[a] = (a == par[a] ? a : get(par[a]));
    }
 
    void uni(int a, int b){
        a = get(a), b = get(b);
        if(s[a] > s[b])swap(a, b);
        par[a] = b, s[b] += s[a];
    }
 
    int get_size(int a){
        return s[get(a)];
    }
    bool same_set(int a, int b){
        return get(a) == get(b);
    }
};
 
const int N = 1005;
vector<int> adj[N], adj2[N];
vector<int> component;
bool vis[N];
int r[N];
 
void dfs(int u){
    component.pb(u);
    vis[u] = true;
    for(int v: adj[u])if(!vis[v])dfs(v);
}
 
int construct(vector<vector<int>> p){
    int n = sz(p);
    vector<vector<int>> ans(n, vector<int>(n, 0));
    
    forn(i,n)adj[i].clear(), adj2[i].clear();
    DSU d(n);
 
    for(int i = 0;i < n; ++i){
        vis[i] = false;
        for(int j = 0;j < n; ++j){
            if(p[i][j] == 2 && i != j){
                adj[i].pb(j);
            }
            if(p[i][j] == 1 && i != j){
                adj2[i].pb(j);
            }
        }
    }
 
    for(int i = 0;i < n; ++i){
        if(!vis[i]){
            component.clear();
            dfs(i);

            if(sz(component) == 2)return 0;
            for(int i = 0;i < sz(component); ++i){
                if(sz(component) > 1)ans[component[i]][component[(i + 1) % sz(component)]] = ans[component[(i + 1) % sz(component)]][component[i]] = 1;
            }
 
            int prev = -1;
            for(int u: component){
                for(int v: adj2[u]){
                    if(!d.same_set(u, v)){
                        ans[u][v] = ans[v][u] = 1;
                        d.uni(u, v);
                    }
                }
                if(prev != -1)d.uni(prev, u);
 
                prev = u;
            }
        }
    }
    for(int i = 0;i < n; ++i){
        for(int j = 0;j < n; ++j){
            if(i == j)continue;
            if(ans[i][j] && !p[i][j])return 0;
        }
    }
    build(ans);
    return 1;
}

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 8 ms 1408 KB Output is correct
7 Correct 177 ms 26032 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 8 ms 1408 KB Output is correct
7 Correct 177 ms 26032 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 7 ms 1232 KB Output is correct
13 Correct 170 ms 22196 KB Output is correct
14 Incorrect 0 ms 332 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 8 ms 1228 KB Output is correct
9 Correct 186 ms 22076 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 8 ms 1356 KB Output is correct
13 Correct 211 ms 26168 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 7 ms 888 KB Output is correct
17 Incorrect 182 ms 24540 KB Answer gives possible 1 while actual possible 0
18 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 47 ms 5808 KB Output is correct
5 Correct 190 ms 22576 KB Output is correct
6 Correct 165 ms 22100 KB Output is correct
7 Correct 209 ms 24124 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 43 ms 5768 KB Output is correct
10 Correct 172 ms 22576 KB Output is correct
11 Correct 168 ms 22072 KB Output is correct
12 Correct 176 ms 25140 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Incorrect 1 ms 332 KB Too many ways to get from 0 to 4, should be 1 found no less than 2
16 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 8 ms 1408 KB Output is correct
7 Correct 177 ms 26032 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 7 ms 1232 KB Output is correct
13 Correct 170 ms 22196 KB Output is correct
14 Incorrect 0 ms 332 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 8 ms 1408 KB Output is correct
7 Correct 177 ms 26032 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 7 ms 1232 KB Output is correct
13 Correct 170 ms 22196 KB Output is correct
14 Incorrect 0 ms 332 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -