oj.uz

답안 #927404

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
927404 2024-02-14T20:07:48 Z VMaksimoski008 슈퍼트리 잇기 (IOI20_supertrees) C++14
21 / 100
 159 ms 22216 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;
 
struct DSU {
    int n, comp;
    vector<int> par, size;
 
    void config(int _n) {
        n = _n + 1;
        comp = _n;
        par.resize(n+1);
        size.resize(n+1, 1);
        for(int i=1; i<=n; i++) par[i] = i;
    }
 
    int get(int u) {
        if(u == par[u]) return u;
        return par[u] = get(par[u]);
    }
 
    bool uni(int u, int v) {
        u = get(u), v = get(v);
 
        if(u == v) return false;
        if(size[u] < size[v]) swap(u, v);
 
        size[u] += size[v];
        par[v] = u;
        comp--;
 
        return true;
    }
 
    int getComp() { return comp; }
    int getSize(int u) { return size[get(u)]; }
    bool sameSet(int u, int v) { return get(u) == get(v); }
    bool isLeader(int u) { return get(u) == u; }
};

vector<vector<int> > graph;
vector<bool> vis;
vector<int> G;

void dfs(int u) {
    vis[u] = 1;
    G.push_back(u);

    for(int &v : graph[u]) {
        if(vis[v]) continue;
        dfs(v);
    }
}
 
int construct(vector<vector<int> > p) {
    int n = p.size();
    vector<vector<int> > B(n, vector<int>(n, 0));
    graph.resize(n);
    vis.resize(n);

    DSU dsu; dsu.config(n);

    for(int i=0; i<n; i++) {
        for(int j=0; j<n; j++) {
            if(p[i][j] == 1)
                if(dsu.uni(i, j)) B[i][j] = B[j][i] = 1;
        }
    }
 
    for(int i=0; i<n; i++) {
        for(int j=0; j<n; j++) {
            if(p[i][j] >= 1 && !dsu.sameSet(i, j)) return 0;
            if(p[i][j] == 0 && dsu.sameSet(i, j)) return 0;
        }
    }

    bool ok = 0;

    for(int i=0; i<n; i++) {
        for(int j=i+1; j<n; j++) {
            if(p[i][j] == 2 && dsu.isLeader(i) && dsu.isLeader(j)) {
                ok = 1;
                graph[i].push_back(j);
                graph[j].push_back(i);
            }
        }
    }

    for(int i=0; i<n && ok; i++) {
        if(vis[i]) continue;

        G.clear();
        dfs(i);

        if(G.size() == 2) return 0;
        if(G.size() == 1) continue;

        for(int i=0; i<G.size()-1; i++)
            for(int j=i+1; j<G.size(); j++)
                if(p[i][j] != 2) return 0;

        G.push_back(G[0]);
        for(int i=0; i<G.size()-1; i++)
            B[G[i]][G[i+1]] = B[G[i+1]][G[i]] = 1;
    }

    build(B);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:98:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |         for(int i=0; i<G.size()-1; i++)
      |                      ~^~~~~~~~~~~
supertrees.cpp:99:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |             for(int j=i+1; j<G.size(); j++)
      |                            ~^~~~~~~~~
supertrees.cpp:103:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |         for(int i=0; i<G.size()-1; i++)
      |                      ~^~~~~~~~~~~

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1180 KB Output is correct
7 Correct 157 ms 22216 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1180 KB Output is correct
7 Correct 157 ms 22216 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 153 ms 22020 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 68 ms 12296 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 41 ms 5716 KB Output is correct
21 Correct 154 ms 22100 KB Output is correct
22 Correct 151 ms 22100 KB Output is correct
23 Correct 159 ms 22212 KB Output is correct
24 Correct 149 ms 22096 KB Output is correct
25 Correct 59 ms 12116 KB Output is correct
26 Correct 57 ms 12052 KB Output is correct
27 Correct 159 ms 22040 KB Output is correct
28 Correct 157 ms 22096 KB Output is correct

Subtask #3
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Incorrect 0 ms 348 KB Answer gives possible 0 while actual possible 1
6 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1180 KB Output is correct
7 Correct 157 ms 22216 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 153 ms 22020 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 68 ms 12296 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 41 ms 5716 KB Output is correct
21 Correct 154 ms 22100 KB Output is correct
22 Correct 151 ms 22100 KB Output is correct
23 Correct 159 ms 22212 KB Output is correct
24 Correct 149 ms 22096 KB Output is correct
25 Correct 59 ms 12116 KB Output is correct
26 Correct 57 ms 12052 KB Output is correct
27 Correct 159 ms 22040 KB Output is correct
28 Correct 157 ms 22096 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Incorrect 0 ms 348 KB Answer gives possible 0 while actual possible 1
34 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1180 KB Output is correct
7 Correct 157 ms 22216 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 153 ms 22020 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 68 ms 12296 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 41 ms 5716 KB Output is correct
21 Correct 154 ms 22100 KB Output is correct
22 Correct 151 ms 22100 KB Output is correct
23 Correct 159 ms 22212 KB Output is correct
24 Correct 149 ms 22096 KB Output is correct
25 Correct 59 ms 12116 KB Output is correct
26 Correct 57 ms 12052 KB Output is correct
27 Correct 159 ms 22040 KB Output is correct
28 Correct 157 ms 22096 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Incorrect 0 ms 348 KB Answer gives possible 0 while actual possible 1
34 Halted 0 ms 0 KB -