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Submission #317860

# Submission time Handle Problem Language Result Execution time Memory
317860 2020-10-30T14:59:41 Z tengiz05 Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 278 ms 22264 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
struct DSU{
	vector<int> p, rnk;
	void init(int n){
		p.assign(n, 0);rnk.assign(n, 0);
		for(int i=0;i<n;i++)p[i] = i;
	}
	int par(int i){
		if(p[i] == i)return i;
		else return p[i] = par(p[i]);
	}
	bool issame(int i, int j){
		return (par(i) == par(j));
	}
	void merge(int i, int j){
		i=par(i), j=par(j);
		if(i == j)return;
		if(rnk[i] > rnk[j]){
			rnk[i]++;
			p[j] = i;
		}else {
			rnk[j]++;
			p[i] = j;
		}
	}
};
int construct(vector<vector<int>> p) {
	int n = p.size();
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			if(p[i][j] == 3)return 0;
		}
	}
	DSU dsu; dsu.init(n);
	for(int i=0;i<n;i++){
		for(int j=0;j<i;j++){
			if(p[i][j] == 0 && dsu.issame(i, j))return 0;
			else if(p[i][j] > 0){
				dsu.merge(i, j);
			}
		}
	}
	vector<bool> used(n);
	vector<bool> ok(n, true);
	vector<vector<int>> ans(n, vector<int>(n,0));
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(i != j && p[i][j] == 1)ok[i] = false;
		}
	}
	DSU d; d.init(n);
	for(int i=0;i<n;i++){
		for(int j=0;j<i;j++){
			if(p[i][j] == 1){
				if(d.issame(i, j))continue;
				ans[i][j] = 1;
				ans[j][i] = 1;
				d.merge(i, j);
			}
		}
		int k=0;
		for(;p[i][k]!=1;k++);
		if(p[i] != p[k])return 0;
		if(used[i])continue;
		int ind = -1;
		for(int j=i+1;j<n;j++){
			if(p[i][j] == 2 && !used[j])ind = j;
		}
		if(ind == -1 || !ok[i])continue;
		queue<int> q;q.push(i);used[i] = true;
		vector<int> t;
		while(!q.empty()){
			int u = q.front();q.pop();
			t.push_back(u);
			for(int v=0;v<n;v++){
				if(ok[v] && !used[v] && p[u][v] == 2){
					used[v] = true;
					q.push(v);
				}
			}
		}
		if(t.size() < 3)return 0;
		t.push_back(t[0]);
		for(int j=1;j<(int)t.size();j++){
			ans[t[j]][t[j-1]] = 1;
			ans[t[j-1]][t[j]] = 1;d.merge(t[j-1], t[j]);
		}
	}
	build(ans);
	return 1;
}

Subtask #1
11.0 / 11.0

# 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 1 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 266 ms 22136 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 1 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 266 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 237 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 111 ms 8184 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 64 ms 5912 KB Output is correct
21 Correct 248 ms 22136 KB Output is correct
22 Correct 248 ms 22104 KB Output is correct
23 Correct 262 ms 22136 KB Output is correct
24 Correct 244 ms 22264 KB Output is correct
25 Correct 101 ms 8184 KB Output is correct
26 Correct 101 ms 8144 KB Output is correct
27 Correct 255 ms 22136 KB Output is correct
28 Correct 237 ms 22104 KB Output is correct

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 1 ms 256 KB Output is correct
4 Correct 1 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 1 ms 256 KB Output is correct
8 Correct 10 ms 1280 KB Output is correct
9 Correct 239 ms 22168 KB Output is correct
10 Correct 1 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 266 ms 22136 KB Output is correct
14 Correct 1 ms 308 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 110 ms 8152 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Correct 63 ms 5752 KB Output is correct
22 Correct 249 ms 22136 KB Output is correct
23 Correct 251 ms 22080 KB Output is correct
24 Correct 260 ms 22136 KB Output is correct
25 Correct 104 ms 12152 KB Output is correct
26 Correct 100 ms 8184 KB Output is correct
27 Correct 260 ms 22136 KB Output is correct
28 Correct 260 ms 22100 KB Output is correct
29 Correct 102 ms 12152 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 62 ms 5752 KB Output is correct
5 Correct 249 ms 22136 KB Output is correct
6 Correct 240 ms 22136 KB Output is correct
7 Correct 278 ms 22104 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 65 ms 5844 KB Output is correct
10 Correct 257 ms 22136 KB Output is correct
11 Correct 253 ms 22136 KB Output is correct
12 Correct 276 ms 22136 KB Output is correct
13 Correct 1 ms 256 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 63 ms 5752 KB Output is correct
17 Correct 266 ms 22136 KB Output is correct
18 Correct 250 ms 22136 KB Output is correct
19 Correct 245 ms 22136 KB Output is correct
20 Correct 246 ms 22264 KB Output is correct

Subtask #5
21.0 / 21.0

# 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 1 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 266 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 237 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 111 ms 8184 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 64 ms 5912 KB Output is correct
21 Correct 248 ms 22136 KB Output is correct
22 Correct 248 ms 22104 KB Output is correct
23 Correct 262 ms 22136 KB Output is correct
24 Correct 244 ms 22264 KB Output is correct
25 Correct 101 ms 8184 KB Output is correct
26 Correct 101 ms 8144 KB Output is correct
27 Correct 255 ms 22136 KB Output is correct
28 Correct 237 ms 22104 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 1 ms 256 KB Output is correct
32 Correct 1 ms 256 KB Output is correct
33 Correct 0 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 1 ms 256 KB Output is correct
36 Correct 10 ms 1280 KB Output is correct
37 Correct 239 ms 22168 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 256 KB Output is correct
40 Correct 11 ms 1152 KB Output is correct
41 Correct 266 ms 22136 KB Output is correct
42 Correct 1 ms 308 KB Output is correct
43 Correct 0 ms 256 KB Output is correct
44 Correct 5 ms 640 KB Output is correct
45 Correct 110 ms 8152 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 0 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Correct 63 ms 5752 KB Output is correct
50 Correct 249 ms 22136 KB Output is correct
51 Correct 251 ms 22080 KB Output is correct
52 Correct 260 ms 22136 KB Output is correct
53 Correct 104 ms 12152 KB Output is correct
54 Correct 100 ms 8184 KB Output is correct
55 Correct 260 ms 22136 KB Output is correct
56 Correct 260 ms 22100 KB Output is correct
57 Correct 102 ms 12152 KB Output is correct
58 Correct 0 ms 256 KB Output is correct
59 Correct 0 ms 256 KB Output is correct
60 Correct 5 ms 640 KB Output is correct
61 Correct 119 ms 8184 KB Output is correct
62 Correct 0 ms 256 KB Output is correct
63 Correct 0 ms 256 KB Output is correct
64 Correct 1 ms 256 KB Output is correct
65 Correct 73 ms 5752 KB Output is correct
66 Correct 103 ms 8184 KB Output is correct
67 Correct 107 ms 8156 KB Output is correct
68 Correct 100 ms 8184 KB Output is correct
69 Correct 104 ms 12152 KB Output is correct

Subtask #6
4.0 / 4.0

# 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 1 ms 256 KB Output is correct
6 Correct 11 ms 1152 KB Output is correct
7 Correct 266 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 237 ms 22136 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 111 ms 8184 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 64 ms 5912 KB Output is correct
21 Correct 248 ms 22136 KB Output is correct
22 Correct 248 ms 22104 KB Output is correct
23 Correct 262 ms 22136 KB Output is correct
24 Correct 244 ms 22264 KB Output is correct
25 Correct 101 ms 8184 KB Output is correct
26 Correct 101 ms 8144 KB Output is correct
27 Correct 255 ms 22136 KB Output is correct
28 Correct 237 ms 22104 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 1 ms 256 KB Output is correct
32 Correct 1 ms 256 KB Output is correct
33 Correct 0 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 1 ms 256 KB Output is correct
36 Correct 10 ms 1280 KB Output is correct
37 Correct 239 ms 22168 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 256 KB Output is correct
40 Correct 11 ms 1152 KB Output is correct
41 Correct 266 ms 22136 KB Output is correct
42 Correct 1 ms 308 KB Output is correct
43 Correct 0 ms 256 KB Output is correct
44 Correct 5 ms 640 KB Output is correct
45 Correct 110 ms 8152 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 0 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Correct 63 ms 5752 KB Output is correct
50 Correct 249 ms 22136 KB Output is correct
51 Correct 251 ms 22080 KB Output is correct
52 Correct 260 ms 22136 KB Output is correct
53 Correct 104 ms 12152 KB Output is correct
54 Correct 100 ms 8184 KB Output is correct
55 Correct 260 ms 22136 KB Output is correct
56 Correct 260 ms 22100 KB Output is correct
57 Correct 102 ms 12152 KB Output is correct
58 Correct 1 ms 256 KB Output is correct
59 Correct 1 ms 256 KB Output is correct
60 Correct 1 ms 256 KB Output is correct
61 Correct 62 ms 5752 KB Output is correct
62 Correct 249 ms 22136 KB Output is correct
63 Correct 240 ms 22136 KB Output is correct
64 Correct 278 ms 22104 KB Output is correct
65 Correct 1 ms 512 KB Output is correct
66 Correct 65 ms 5844 KB Output is correct
67 Correct 257 ms 22136 KB Output is correct
68 Correct 253 ms 22136 KB Output is correct
69 Correct 276 ms 22136 KB Output is correct
70 Correct 1 ms 256 KB Output is correct
71 Correct 1 ms 256 KB Output is correct
72 Correct 1 ms 256 KB Output is correct
73 Correct 63 ms 5752 KB Output is correct
74 Correct 266 ms 22136 KB Output is correct
75 Correct 250 ms 22136 KB Output is correct
76 Correct 245 ms 22136 KB Output is correct
77 Correct 246 ms 22264 KB Output is correct
78 Correct 0 ms 256 KB Output is correct
79 Correct 0 ms 256 KB Output is correct
80 Correct 5 ms 640 KB Output is correct
81 Correct 119 ms 8184 KB Output is correct
82 Correct 0 ms 256 KB Output is correct
83 Correct 0 ms 256 KB Output is correct
84 Correct 1 ms 256 KB Output is correct
85 Correct 73 ms 5752 KB Output is correct
86 Correct 103 ms 8184 KB Output is correct
87 Correct 107 ms 8156 KB Output is correct
88 Correct 100 ms 8184 KB Output is correct
89 Correct 104 ms 12152 KB Output is correct
90 Correct 0 ms 256 KB Output is correct
91 Correct 1 ms 256 KB Output is correct
92 Correct 5 ms 656 KB Output is correct
93 Correct 119 ms 8184 KB Output is correct
94 Correct 0 ms 256 KB Output is correct
95 Correct 0 ms 256 KB Output is correct
96 Correct 1 ms 256 KB Output is correct
97 Correct 26 ms 2296 KB Output is correct
98 Correct 104 ms 8184 KB Output is correct
99 Correct 103 ms 8312 KB Output is correct
100 Correct 101 ms 8152 KB Output is correct
101 Correct 101 ms 8184 KB Output is correct
102 Correct 133 ms 8184 KB Output is correct
103 Correct 123 ms 8312 KB Output is correct
104 Correct 115 ms 8184 KB Output is correct
105 Correct 114 ms 8316 KB Output is correct