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Submission #768203

# Submission time Handle Problem Language Result Execution time Memory
768203 2023-06-27T16:54:50 Z ZeroCool Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 172 ms 28076 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

const int mxn = 1005;

vector<int> g[mxn];
vector<int> comp;
bool vis[mxn];

struct DSU{
    
    int sz[mxn];
    int g[mxn];

    DSU(int n){
        for(int i = 0 ;i<n;i++){
            sz[i] = 1;
            g[i] = i;
        }
    }

    int find(int x){
        if(x == g[x])return x;
        return g[x] = find(g[x]);
    }

    bool unite(int a,int b){
        a = find(a);
        b = find(b);
        if(a == b)return false;

        if(sz[a] > sz[b])swap(a,b);

        g[a] = b;
        sz[b] += sz[a];
        return true;
    }

	inline bool same(int a,int b){
		return find(a) == find(b);
	}
};
  
void dfs(int x){
    vis[x] = true;
    comp.push_back(x);
    for(auto y : g[x]){
        if(vis[y])continue;
        dfs(y);
    }
}

int construct(vector<vector<int>> p) {


	int n = p.size();
	
	DSU d(n);

	vector<vector<int> > ans(n,vector<int>(n,0));

	

	for(int i = 0;i<n;i++){
		for(int j = i+1;j<n;j++){
			//ans[i][j] = ans[j][i] = 0;
			if(p[i][j] == 3)return 0;
			if(p[i][j] == 1)d.unite(i,j);
		}
	}

	for(int i = 0;i<n;i++){
		for(int j = i+1;j<n;j++){
			if(d.same(i,j) && p[i][j] == 0)return 0;
		}
	}

	for(int i = 0;i<n;i++){
		if(d.find(i) != i){
			ans[i][d.find(i)] = ans[d.find(i)][i] = 1;
		}
	}

	for(int i = 0;i<n;i++){
		for(int j = i+1;j<n;j++){
			if(p[i][j] == 2 && d.find(i) == i && d.find(j) == j){
				g[i].push_back(j);
				g[j].push_back(i);
			}
		}
	}

	for(int i = 0;i<n;i++){
		if(vis[i] || d.find(i) != i)continue;

		comp.clear();
		dfs(i);

		if(comp.size() == 2)return 0;

		for(auto x : comp){
			for(auto y : comp){
				if(x != y && p[x][y] != 2)return 0;
			}
		}

		int sz = comp.size();

		for(int j = 0;j<sz-1;j++){
			ans[comp[j]][comp[j+1]] = ans[comp[j+1]][comp[j]] = 1;
		}

		if(sz != 1)ans[comp[0]][comp.back()] = ans[comp.back()][comp[0]] = 1;
	}
	build(ans);
	return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1236 KB Output is correct
7 Correct 154 ms 23956 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1236 KB Output is correct
7 Correct 154 ms 23956 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 7 ms 1200 KB Output is correct
13 Correct 151 ms 23956 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 64 ms 14096 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 38 ms 6192 KB Output is correct
21 Correct 149 ms 24012 KB Output is correct
22 Correct 150 ms 24012 KB Output is correct
23 Correct 156 ms 23952 KB Output is correct
24 Correct 149 ms 23964 KB Output is correct
25 Correct 60 ms 14096 KB Output is correct
26 Correct 58 ms 14104 KB Output is correct
27 Correct 153 ms 23952 KB Output is correct
28 Correct 148 ms 24016 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 7 ms 1212 KB Output is correct
9 Correct 149 ms 23948 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1488 KB Output is correct
13 Correct 157 ms 28076 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 948 KB Output is correct
17 Correct 75 ms 17048 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 42 ms 6348 KB Output is correct
22 Correct 150 ms 24588 KB Output is correct
23 Correct 150 ms 24012 KB Output is correct
24 Correct 158 ms 27148 KB Output is correct
25 Correct 61 ms 14028 KB Output is correct
26 Correct 62 ms 14668 KB Output is correct
27 Correct 148 ms 24076 KB Output is correct
28 Correct 158 ms 26088 KB Output is correct
29 Correct 59 ms 14024 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 37 ms 6288 KB Output is correct
5 Correct 154 ms 24012 KB Output is correct
6 Correct 149 ms 24016 KB Output is correct
7 Correct 156 ms 23964 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 38 ms 6348 KB Output is correct
10 Correct 152 ms 24596 KB Output is correct
11 Correct 152 ms 23964 KB Output is correct
12 Correct 159 ms 27152 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 37 ms 6284 KB Output is correct
17 Correct 172 ms 24740 KB Output is correct
18 Correct 150 ms 24268 KB Output is correct
19 Correct 152 ms 24124 KB Output is correct
20 Correct 147 ms 23952 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1236 KB Output is correct
7 Correct 154 ms 23956 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 7 ms 1200 KB Output is correct
13 Correct 151 ms 23956 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 64 ms 14096 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 38 ms 6192 KB Output is correct
21 Correct 149 ms 24012 KB Output is correct
22 Correct 150 ms 24012 KB Output is correct
23 Correct 156 ms 23952 KB Output is correct
24 Correct 149 ms 23964 KB Output is correct
25 Correct 60 ms 14096 KB Output is correct
26 Correct 58 ms 14104 KB Output is correct
27 Correct 153 ms 23952 KB Output is correct
28 Correct 148 ms 24016 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 7 ms 1212 KB Output is correct
37 Correct 149 ms 23948 KB Output is correct
38 Correct 1 ms 324 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1488 KB Output is correct
41 Correct 157 ms 28076 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 3 ms 948 KB Output is correct
45 Correct 75 ms 17048 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 42 ms 6348 KB Output is correct
50 Correct 150 ms 24588 KB Output is correct
51 Correct 150 ms 24012 KB Output is correct
52 Correct 158 ms 27148 KB Output is correct
53 Correct 61 ms 14028 KB Output is correct
54 Correct 62 ms 14668 KB Output is correct
55 Correct 148 ms 24076 KB Output is correct
56 Correct 158 ms 26088 KB Output is correct
57 Correct 59 ms 14024 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 0 ms 320 KB Output is correct
60 Correct 3 ms 852 KB Output is correct
61 Correct 64 ms 14092 KB Output is correct
62 Correct 0 ms 212 KB Output is correct
63 Correct 1 ms 212 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 38 ms 6284 KB Output is correct
66 Correct 62 ms 14620 KB Output is correct
67 Correct 59 ms 14092 KB Output is correct
68 Correct 60 ms 14224 KB Output is correct
69 Correct 59 ms 14092 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 7 ms 1236 KB Output is correct
7 Correct 154 ms 23956 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 7 ms 1200 KB Output is correct
13 Correct 151 ms 23956 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 64 ms 14096 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 38 ms 6192 KB Output is correct
21 Correct 149 ms 24012 KB Output is correct
22 Correct 150 ms 24012 KB Output is correct
23 Correct 156 ms 23952 KB Output is correct
24 Correct 149 ms 23964 KB Output is correct
25 Correct 60 ms 14096 KB Output is correct
26 Correct 58 ms 14104 KB Output is correct
27 Correct 153 ms 23952 KB Output is correct
28 Correct 148 ms 24016 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 7 ms 1212 KB Output is correct
37 Correct 149 ms 23948 KB Output is correct
38 Correct 1 ms 324 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1488 KB Output is correct
41 Correct 157 ms 28076 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 3 ms 948 KB Output is correct
45 Correct 75 ms 17048 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 42 ms 6348 KB Output is correct
50 Correct 150 ms 24588 KB Output is correct
51 Correct 150 ms 24012 KB Output is correct
52 Correct 158 ms 27148 KB Output is correct
53 Correct 61 ms 14028 KB Output is correct
54 Correct 62 ms 14668 KB Output is correct
55 Correct 148 ms 24076 KB Output is correct
56 Correct 158 ms 26088 KB Output is correct
57 Correct 59 ms 14024 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 37 ms 6288 KB Output is correct
62 Correct 154 ms 24012 KB Output is correct
63 Correct 149 ms 24016 KB Output is correct
64 Correct 156 ms 23964 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 38 ms 6348 KB Output is correct
67 Correct 152 ms 24596 KB Output is correct
68 Correct 152 ms 23964 KB Output is correct
69 Correct 159 ms 27152 KB Output is correct
70 Correct 1 ms 324 KB Output is correct
71 Correct 0 ms 212 KB Output is correct
72 Correct 1 ms 212 KB Output is correct
73 Correct 37 ms 6284 KB Output is correct
74 Correct 172 ms 24740 KB Output is correct
75 Correct 150 ms 24268 KB Output is correct
76 Correct 152 ms 24124 KB Output is correct
77 Correct 147 ms 23952 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 0 ms 320 KB Output is correct
80 Correct 3 ms 852 KB Output is correct
81 Correct 64 ms 14092 KB Output is correct
82 Correct 0 ms 212 KB Output is correct
83 Correct 1 ms 212 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Correct 38 ms 6284 KB Output is correct
86 Correct 62 ms 14620 KB Output is correct
87 Correct 59 ms 14092 KB Output is correct
88 Correct 60 ms 14224 KB Output is correct
89 Correct 59 ms 14092 KB Output is correct
90 Correct 1 ms 212 KB Output is correct
91 Correct 1 ms 212 KB Output is correct
92 Correct 3 ms 852 KB Output is correct
93 Correct 61 ms 14016 KB Output is correct
94 Correct 1 ms 212 KB Output is correct
95 Correct 0 ms 212 KB Output is correct
96 Correct 0 ms 328 KB Output is correct
97 Correct 19 ms 3796 KB Output is correct
98 Correct 59 ms 14096 KB Output is correct
99 Correct 59 ms 14108 KB Output is correct
100 Correct 58 ms 14112 KB Output is correct
101 Correct 57 ms 14096 KB Output is correct
102 Correct 58 ms 14028 KB Output is correct
103 Correct 60 ms 14032 KB Output is correct
104 Correct 61 ms 14104 KB Output is correct
105 Correct 62 ms 14096 KB Output is correct