oj.uz

답안 #853584

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
853584 2023-09-24T17:03:58 Z ntkphong 슈퍼트리 잇기 (IOI20_supertrees) C++14
11 / 100
 167 ms 22340 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<int> lab;
 
int get_root(int u) {
    return lab[u] == u ? u : lab[u] = get_root(lab[u]);
}
 
bool unite(int u, int v) {
    u = get_root(u);
    v = get_root(v);
    
    if(u == v) return false;
    lab[v] = u;
    
    return true;
}
 
int construct(vector<vector<int>> p) {
	int n = p.size();
    
    lab.resize(n);
    for(int i = 0; i < n; i ++) lab[i] = i;
    
    vector<int> mark(n, 0);
    vector<vector<int>> answer(n, vector<int> (n, 0));	
    
	for (int i = 0; i < n; i ++) {
	    for(int j = 0; j < n; j ++) {
	        if(get_root(i) == get_root(j) || p[i][j] != 1) continue ;
	        
	        answer[i][j] = answer[j][i] = 1;
            unite(i, j);
	    }
	}
	
	for(int i = 0; i < n; i ++) {
        if(get_root(i) != i) continue ;
        
        vector<int> row;
        
        for(int j = 0; j < n; j ++) {
            if(p[i][j] != 2) continue ;
            if(mark[j]) return 0;
            row.push_back(j);
        }
        
        if(row.empty()) continue ; 
        
        int root = i;
        int k = i;
        int cnt = 1;
        
        for(int j = 0; j < row.size(); j ++) {
            if(unite(k, row[j])) {
                answer[row[j]][k] = 1;
                answer[k][row[j]] = 1;
                k = row[j];
                cnt ++ ;
            }
        }
        
        answer[root][k] = 1;
        answer[k][root] = 1;
        
        for(int j = 0; j < n; j ++) {
            if(get_root(i) == get_root(j)) {
                mark[j] = 1;
            }
        }
        
        for(int x : row) {
            for(int y : row) {
                if(x == y) continue ;
                if(p[x][y] != 2) return 0;
            }
        }
          
        if(cnt <= 2) return 0;
	}
	
	for(int i = 0; i < n; i ++) {
        if(get_root(i) != i) continue ;
        
        vector<int> row;
        
        for(int j = 0; j < n; j ++) {
            if(p[i][j] != 3) continue ;
            if(mark[j]) return 0;
            row.push_back(j);
        }
        
        if(row.empty()) continue ; 
        
        int root = i;
        int k = i, prev_k = 0;
        int cnt = 1;
        
        for(int j = 0; j < row.size(); j ++) {
            if(unite(k, row[j])) {
                answer[j][k] = 1;
                answer[k][j] = 1;
                
                prev_k = k;
                k = j;
                cnt ++ ;
            }
        }
        
        answer[root][k] = 1;
        answer[k][root] = 1;
        
        answer[root][prev_k] = 1;
        answer[prev_k][root] = 1;
        
        
        for(int j = 0; j < n; j ++) {
            if(get_root(i) == get_root(j)) {
                mark[j] = 1;
            }
        }
        
        for(int x : row) {
            for(int y : row) {
                if(x == y) continue ;
                if(p[x][y] != 3) return 0;
            }
        }
        
        if(cnt <= 3) return 0;
	}
	
  	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:56:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for(int j = 0; j < row.size(); j ++) {
      |                        ~~^~~~~~~~~~~~
supertrees.cpp:101:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  101 |         for(int j = 0; j < row.size(); j ++) {
      |                        ~~^~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 158 ms 22048 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 158 ms 22048 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 167 ms 22340 KB Output is correct
14 Incorrect 1 ms 344 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 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 7 ms 1112 KB Output is correct
9 Correct 159 ms 22040 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 6 ms 1112 KB Output is correct
13 Correct 155 ms 22044 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 66 ms 12036 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 39 ms 5712 KB Output is correct
22 Correct 156 ms 22024 KB Output is correct
23 Correct 157 ms 22096 KB Output is correct
24 Correct 164 ms 22228 KB Output is correct
25 Correct 60 ms 12112 KB Output is correct
26 Incorrect 158 ms 22032 KB Answer gives possible 1 while actual possible 0
27 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 43 ms 5712 KB Output is correct
5 Correct 158 ms 22096 KB Output is correct
6 Correct 159 ms 22164 KB Output is correct
7 Correct 162 ms 22096 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 39 ms 5824 KB Output is correct
10 Correct 157 ms 22096 KB Output is correct
11 Correct 155 ms 22096 KB Output is correct
12 Correct 161 ms 22096 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Incorrect 15 ms 3420 KB Answer gives possible 0 while actual possible 1
17 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 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 158 ms 22048 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 167 ms 22340 KB Output is correct
14 Incorrect 1 ms 344 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 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 158 ms 22048 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 167 ms 22340 KB Output is correct
14 Incorrect 1 ms 344 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -