oj.uz

Submission #956546

# Submission time Handle Problem Language Result Execution time Memory
956546 2024-04-02T06:58:34 Z KK_1729 Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 159 ms 22220 KB 
#include "supertrees.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;

struct UFDS {
    vector<int> link, siz;
    UFDS(int n) : link(n), siz(n, 1) { iota(link.begin(), link.end(), 0); } //each element as its own subset, with size 1
    int findRoot(int x) {
        if(x == link[x]) return x;
        return link[x] = findRoot(link[x]);
        /*
        A shorter way of writing the following is:
        return x == link[x]  ? x : link[x]  =  findRoot(link[x]);  
        */
    }
    bool same(int x, int y) { return findRoot(x) == findRoot(y); }
    bool unite(int x, int y) {
        x = findRoot(x);
        y = findRoot(y);
        if (x == y)
            return false;
        if (siz[x] < siz[y]) swap(x, y);
        siz[x] += siz[y];
        link[y] = x;
        return true;
    }
    int size(int x) { return siz[findRoot(x)]; }
};


int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	std::vector<std::vector<int>> answer;
	for (int i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		answer.push_back(row);
	}


	UFDS ds(n);
	for (int i = 0; i < n; ++i){
		for (int j = 0; j < n; ++j){
			if (p[i][j] == 1) ds.unite(i, j);
			else{
				if (ds.same(i, j)) return 0;
			}
		}
	}


	vector<vector<int>> parents(n);

	for (int i = 0; i < n; ++i) parents[ds.findRoot(i)].push_back(i);
	
	for (auto item: parents){
		int u = item.size();
		for (int i = 0; i < u-1; i++){
			answer[item[i]][item[i+1]] = 1;
			answer[item[i+1]][item[i]] = 1;
		}
		// if (u > 1){
		// 	answer[item[0]][item[u-1]] = 1;
		// 	answer[item[u-1]][item[0]] = 1;
		// }
	}
	build(answer);
	return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 7 ms 1272 KB Output is correct
7 Correct 147 ms 22220 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 7 ms 1272 KB Output is correct
7 Correct 147 ms 22220 KB Output is correct
8 Correct 1 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 0 ms 348 KB Output is correct
12 Correct 7 ms 1116 KB Output is correct
13 Correct 150 ms 22096 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 856 KB Output is correct
17 Correct 63 ms 12060 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 38 ms 5716 KB Output is correct
21 Correct 148 ms 22096 KB Output is correct
22 Correct 147 ms 22096 KB Output is correct
23 Correct 159 ms 22100 KB Output is correct
24 Correct 148 ms 22024 KB Output is correct
25 Correct 66 ms 12372 KB Output is correct
26 Correct 60 ms 12116 KB Output is correct
27 Correct 154 ms 22100 KB Output is correct
28 Correct 148 ms 22096 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory 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 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Too few ways to get from 0 to 1, should be 2 found 0
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 7 ms 1272 KB Output is correct
7 Correct 147 ms 22220 KB Output is correct
8 Correct 1 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 0 ms 348 KB Output is correct
12 Correct 7 ms 1116 KB Output is correct
13 Correct 150 ms 22096 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 856 KB Output is correct
17 Correct 63 ms 12060 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 38 ms 5716 KB Output is correct
21 Correct 148 ms 22096 KB Output is correct
22 Correct 147 ms 22096 KB Output is correct
23 Correct 159 ms 22100 KB Output is correct
24 Correct 148 ms 22024 KB Output is correct
25 Correct 66 ms 12372 KB Output is correct
26 Correct 60 ms 12116 KB Output is correct
27 Correct 154 ms 22100 KB Output is correct
28 Correct 148 ms 22096 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 7 ms 1272 KB Output is correct
7 Correct 147 ms 22220 KB Output is correct
8 Correct 1 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 0 ms 348 KB Output is correct
12 Correct 7 ms 1116 KB Output is correct
13 Correct 150 ms 22096 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 856 KB Output is correct
17 Correct 63 ms 12060 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 38 ms 5716 KB Output is correct
21 Correct 148 ms 22096 KB Output is correct
22 Correct 147 ms 22096 KB Output is correct
23 Correct 159 ms 22100 KB Output is correct
24 Correct 148 ms 22024 KB Output is correct
25 Correct 66 ms 12372 KB Output is correct
26 Correct 60 ms 12116 KB Output is correct
27 Correct 154 ms 22100 KB Output is correct
28 Correct 148 ms 22096 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -