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Submission #1073590

# Submission time Handle Problem Language Result Execution time Memory
1073590 2024-08-24T16:22:33 Z blushingecchigirl Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 140 ms 24184 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();
        for(int ii = 0; ii<sz; ii++) {
            for(int j = 0; j<sz; j++) {
                if(p[a[i][ii]][a[i][j]] == 0 || p[a[i][ii]][a[i][j]] == 3) ctr = 0;
            }
        }
        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;
            }
            for(size_t iii = 0; iii < tree[ii].size(); iii++) {
                for(size_t j = 0; j < tree[ii].size(); j++) {
                    if(p[tree[ii][iii]][tree[ii][j]] != 1) ctr = 0;
                }
            }
            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(circle.size() == 2) ctr = 0;
    }
	if(ctr) build(b);
	return ctr;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 344 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 137 ms 22096 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 344 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 137 ms 22096 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 5 ms 1116 KB Output is correct
13 Correct 126 ms 22036 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 79 ms 12272 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 32 ms 5708 KB Output is correct
21 Correct 135 ms 22100 KB Output is correct
22 Correct 128 ms 22100 KB Output is correct
23 Correct 138 ms 22100 KB Output is correct
24 Correct 119 ms 22100 KB Output is correct
25 Correct 58 ms 12312 KB Output is correct
26 Correct 51 ms 12116 KB Output is correct
27 Correct 125 ms 22040 KB Output is correct
28 Correct 116 ms 22040 KB Output is correct

Subtask #3
19.0 / 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 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 5 ms 1116 KB Output is correct
9 Correct 117 ms 22044 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 121 ms 22036 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 73 ms 14164 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 32 ms 6236 KB Output is correct
22 Correct 130 ms 24184 KB Output is correct
23 Correct 124 ms 24148 KB Output is correct
24 Correct 127 ms 23944 KB Output is correct
25 Correct 51 ms 14164 KB Output is correct
26 Correct 51 ms 14164 KB Output is correct
27 Correct 117 ms 24148 KB Output is correct
28 Correct 132 ms 24148 KB Output is correct
29 Correct 51 ms 14160 KB Output is correct

Subtask #4
35.0 / 35.0

# 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 32 ms 5728 KB Output is correct
5 Correct 126 ms 22232 KB Output is correct
6 Correct 140 ms 22100 KB Output is correct
7 Correct 131 ms 22100 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 29 ms 5928 KB Output is correct
10 Correct 127 ms 22044 KB Output is correct
11 Correct 117 ms 22144 KB Output is correct
12 Correct 127 ms 22100 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 28 ms 5712 KB Output is correct
17 Correct 125 ms 22096 KB Output is correct
18 Correct 117 ms 22100 KB Output is correct
19 Correct 117 ms 22100 KB Output is correct
20 Correct 121 ms 22040 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 344 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 137 ms 22096 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 5 ms 1116 KB Output is correct
13 Correct 126 ms 22036 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 79 ms 12272 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 32 ms 5708 KB Output is correct
21 Correct 135 ms 22100 KB Output is correct
22 Correct 128 ms 22100 KB Output is correct
23 Correct 138 ms 22100 KB Output is correct
24 Correct 119 ms 22100 KB Output is correct
25 Correct 58 ms 12312 KB Output is correct
26 Correct 51 ms 12116 KB Output is correct
27 Correct 125 ms 22040 KB Output is correct
28 Correct 116 ms 22040 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 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 5 ms 1116 KB Output is correct
37 Correct 117 ms 22044 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 6 ms 1116 KB Output is correct
41 Correct 121 ms 22036 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 860 KB Output is correct
45 Correct 73 ms 14164 KB Output is correct
46 Correct 0 ms 344 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 32 ms 6236 KB Output is correct
50 Correct 130 ms 24184 KB Output is correct
51 Correct 124 ms 24148 KB Output is correct
52 Correct 127 ms 23944 KB Output is correct
53 Correct 51 ms 14164 KB Output is correct
54 Correct 51 ms 14164 KB Output is correct
55 Correct 117 ms 24148 KB Output is correct
56 Correct 132 ms 24148 KB Output is correct
57 Correct 51 ms 14160 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 1 ms 344 KB Output is correct
60 Correct 4 ms 860 KB Output is correct
61 Correct 94 ms 14248 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 32 ms 6232 KB Output is correct
66 Correct 56 ms 14068 KB Output is correct
67 Correct 53 ms 14164 KB Output is correct
68 Correct 55 ms 14160 KB Output is correct
69 Correct 67 ms 14160 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 344 KB Output is correct
6 Correct 5 ms 1112 KB Output is correct
7 Correct 137 ms 22096 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 5 ms 1116 KB Output is correct
13 Correct 126 ms 22036 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 79 ms 12272 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 32 ms 5708 KB Output is correct
21 Correct 135 ms 22100 KB Output is correct
22 Correct 128 ms 22100 KB Output is correct
23 Correct 138 ms 22100 KB Output is correct
24 Correct 119 ms 22100 KB Output is correct
25 Correct 58 ms 12312 KB Output is correct
26 Correct 51 ms 12116 KB Output is correct
27 Correct 125 ms 22040 KB Output is correct
28 Correct 116 ms 22040 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 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 5 ms 1116 KB Output is correct
37 Correct 117 ms 22044 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 6 ms 1116 KB Output is correct
41 Correct 121 ms 22036 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 860 KB Output is correct
45 Correct 73 ms 14164 KB Output is correct
46 Correct 0 ms 344 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 32 ms 6236 KB Output is correct
50 Correct 130 ms 24184 KB Output is correct
51 Correct 124 ms 24148 KB Output is correct
52 Correct 127 ms 23944 KB Output is correct
53 Correct 51 ms 14164 KB Output is correct
54 Correct 51 ms 14164 KB Output is correct
55 Correct 117 ms 24148 KB Output is correct
56 Correct 132 ms 24148 KB Output is correct
57 Correct 51 ms 14160 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 32 ms 5728 KB Output is correct
62 Correct 126 ms 22232 KB Output is correct
63 Correct 140 ms 22100 KB Output is correct
64 Correct 131 ms 22100 KB Output is correct
65 Correct 0 ms 344 KB Output is correct
66 Correct 29 ms 5928 KB Output is correct
67 Correct 127 ms 22044 KB Output is correct
68 Correct 117 ms 22144 KB Output is correct
69 Correct 127 ms 22100 KB Output is correct
70 Correct 1 ms 348 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 1 ms 344 KB Output is correct
73 Correct 28 ms 5712 KB Output is correct
74 Correct 125 ms 22096 KB Output is correct
75 Correct 117 ms 22100 KB Output is correct
76 Correct 117 ms 22100 KB Output is correct
77 Correct 121 ms 22040 KB Output is correct
78 Correct 0 ms 344 KB Output is correct
79 Correct 1 ms 344 KB Output is correct
80 Correct 4 ms 860 KB Output is correct
81 Correct 94 ms 14248 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 32 ms 6232 KB Output is correct
86 Correct 56 ms 14068 KB Output is correct
87 Correct 53 ms 14164 KB Output is correct
88 Correct 55 ms 14160 KB Output is correct
89 Correct 67 ms 14160 KB Output is correct
90 Correct 0 ms 344 KB Output is correct
91 Correct 0 ms 348 KB Output is correct
92 Correct 4 ms 860 KB Output is correct
93 Correct 71 ms 14240 KB Output is correct
94 Correct 0 ms 348 KB Output is correct
95 Correct 0 ms 348 KB Output is correct
96 Correct 0 ms 348 KB Output is correct
97 Correct 13 ms 3932 KB Output is correct
98 Correct 54 ms 14084 KB Output is correct
99 Correct 53 ms 14164 KB Output is correct
100 Correct 50 ms 14220 KB Output is correct
101 Correct 66 ms 14164 KB Output is correct
102 Correct 54 ms 14160 KB Output is correct
103 Correct 59 ms 14160 KB Output is correct
104 Correct 68 ms 14164 KB Output is correct
105 Correct 72 ms 14068 KB Output is correct