oj.uz

Submission #301301

# Submission time Handle Problem Language Result Execution time Memory
301301 2020-09-17T20:31:49 Z Gilgamesh Connecting Supertrees (IOI20_supertrees) C++17
19 / 100
 261 ms 22392 KB 
#include "supertrees.h"
#include <vector>

const int mxN = 1000;

using namespace std;

int parent[mxN];
int rnk[mxN];

int find(int x) 
{ 
    if(parent[x] == -1)
        parent[x] = x;
    if (parent[x] != x) { 
        parent[x] = find(parent[x]); 
    }
    return parent[x]; 
}
bool merge(int x, int y) 
{ 
    int xRoot = find(x), yRoot = find(y); 
    if (xRoot == yRoot) 
        return false; 
    if (rnk[xRoot] < rnk[yRoot]) 
        parent[xRoot] = yRoot; 
    else if (rnk[yRoot] < rnk[xRoot]) 
        parent[yRoot] = xRoot; 
    else 
    { 
        parent[yRoot] = xRoot; 
        rnk[xRoot] = rnk[xRoot] + 1; 
    } 
    return true;
} 

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);
    }
    for(int i = 0; i < n; ++i){
        parent[i] = i;
    }
    for(int i = 0; i < n; ++i){
        for(int j = i + 1; j < n; ++j){
            if(!p[i][j] && find(i) == find(j)){
                return 0;
            }
            if(p[i][j]) merge(i, j);
        }
    }
    for(int i = 0; i < n; ++i){
        for(int j = i + 1; j < n; ++j){
            if(!p[i][j] && find(i) == find(j)) return 0;
        }
    }
    vector<int> sets[n];
    for(int i = 0; i < n; ++i){
        int rep = find(i);
        sets[rep].emplace_back(i);
    }
    for(int i = 0; i < n; ++i){
        int sz = sets[i].size();
        if(sz == 2) return 0;
        for(int j = 0; j < sz - 1; ++j){
            answer[sets[i][j]][sets[i][j + 1]] = 1;
            answer[sets[i][j + 1]][sets[i][j]] = 1;
        }
        if(sz > 1){
            answer[sets[i][0]][sets[i][sz-1]] = 1;
            answer[sets[i][sz-1]][sets[i][0]] = 1;
        }
    }
    build(answer);
    return 1;
}

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 0 ms 256 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 0 ms 256 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 10 ms 1152 KB Output is correct
9 Correct 246 ms 22312 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 11 ms 1152 KB Output is correct
13 Correct 256 ms 22136 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 113 ms 12112 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 65 ms 5828 KB Output is correct
22 Correct 249 ms 22136 KB Output is correct
23 Correct 243 ms 22136 KB Output is correct
24 Correct 261 ms 22268 KB Output is correct
25 Correct 107 ms 12152 KB Output is correct
26 Correct 99 ms 12112 KB Output is correct
27 Correct 243 ms 22392 KB Output is correct
28 Correct 261 ms 22136 KB Output is correct
29 Correct 105 ms 12152 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Incorrect 0 ms 256 KB Too many ways to get from 1 to 4, should be 1 found no less than 2
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 0 ms 256 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Incorrect 0 ms 256 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -