oj.uz

Submission #1073572

# Submission time Handle Problem Language Result Execution time Memory
1073572 2024-08-24T16:14:23 Z blushingecchigirl Connecting Supertrees (IOI20_supertrees) C++17
46 / 100
 127 ms 24188 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back

struct dsu {
    vector<int> parent, rank;
    int size;

    dsu(int sz) {
        size = sz;
        rank.assign(size, 1);
        parent.resize(size);
        for(int i = 0; i<size; i++) parent[i] = i;
    }
    int search(int v) {
        if(v == parent[v]) return v;
        return parent[v] = search(parent[v]);
    }
    void connect(int v, int u) {
        v = search(v);
        u = search(u);
        if(v == u) return;
        if(rank[v]>=rank[u]) parent[u] = v;
        else parent[v] = u;
        if(rank[v] == rank[u]) rank[v]++;
        return;
    }
};

void build(std::vector<std::vector<int>> b);
int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	bool ctr = 1;
    vector<vector<int>> b(n);
    for(int i = 0; i<n; i++) b[i].resize(n, 0);
    
    vector<int> a[n];
    dsu d = dsu(n);
    for(int i = 0; i<n; i++) {
        for(int j = 0; j<n; j++) {
            if(p[i][j]) d.connect(i, j);
        }
    }
    for(int i = 0; i<n; i++) {
        a[d.search(i)].pb(i);
    }
    for(int i = 0; i<n; i++) {
        int sz = a[i].size();
        if(sz<=1) continue;
        vector<int> tree[sz], circle;
        dsu dd = dsu(sz);
        for(int ii = 0; ii<sz; ii++) {
            for(int j = 0; j<sz; j++) {
                if(p[a[i][ii]][a[i][j]] == 1) dd.connect(ii, j);
            }
        }
        for(int ii = 0; ii<sz; ii++) {
            tree[dd.search(ii)].pb(a[i][ii]);
        }
        for(int ii = 0; ii<sz; ii++) {
            if(tree[ii].size() == 0) continue;
            if(tree[ii].size()>1) {
                for(size_t j = 1; j<tree[ii].size(); j++) b[tree[ii][j]][tree[ii][j-1]] = b[tree[ii][j-1]][tree[ii][j]] = 1;
            }
            circle.pb(tree[ii][0]);
        }
        for(size_t ii = 1; ii<circle.size(); ii++) {
            b[circle[ii]][circle[ii-1]] = b[circle[ii-1]][circle[ii]] = 1;
        }
        if(circle.size()>1) b[circle[0]][circle.back()] = b[circle.back()][circle[0]] = 1;
    }
	if(ctr) build(b);
	return ctr;
}

Subtask #1
11.0 / 11.0

# 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 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 118 ms 22024 KB Output is correct

Subtask #2
0 / 10.0

# 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 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 118 ms 22024 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 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 114 ms 22020 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

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 372 KB Output is correct
4 Incorrect 1 ms 348 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory 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 31 ms 5712 KB Output is correct
5 Correct 127 ms 22100 KB Output is correct
6 Correct 120 ms 22100 KB Output is correct
7 Correct 121 ms 22032 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 30 ms 5724 KB Output is correct
10 Correct 116 ms 22100 KB Output is correct
11 Correct 123 ms 22096 KB Output is correct
12 Correct 125 ms 22100 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 348 KB Output is correct
16 Correct 30 ms 5852 KB Output is correct
17 Correct 119 ms 24052 KB Output is correct
18 Correct 117 ms 24188 KB Output is correct
19 Correct 125 ms 24148 KB Output is correct
20 Correct 119 ms 24148 KB Output is correct

Subtask #5
0 / 21.0

# 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 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 118 ms 22024 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 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 114 ms 22020 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 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 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 118 ms 22024 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 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 114 ms 22020 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -