oj.uz

Submission #853684

# Submission time Handle Problem Language Result Execution time Memory
853684 2023-09-25T02:52:11 Z ntkphong Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 190 ms 22236 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<int> par;
 
int get_root(int u) {
    return par[u] == u ? u : par[u] = get_root(par[u]);
}
 
bool unite(int u, int v) {
    u = get_root(u);
    v = get_root(v);
 
    if(u == v) return false;
 
    par[v] = u;
    return true;
}
 
int construct(vector<vector<int>> p) {
	int n = p.size();
 
    par.resize(n);
    for(int i = 0; i < n; i ++) par[i] = i;
 
    vector<vector<int>> answer(n, vector<int> (n, 0));
    vector<bool> mark(n, false);
 
    for(int i = 0; i < n; i ++) {
        vector<int> a;
 
        for(int j = 0; j < n; j ++) {
            if(i == j || p[i][j] != 1) continue ;
            a.push_back(j);
        }
 
        if(a.empty()) continue ;
 
        for(int j = 0; j < a.size(); j ++) {
            if(unite(i, a[j])) {
                answer[i][a[j]] = 1;
                answer[a[j]][i] = 1;
            }
        }
    }
 
    for(int i = 0; i < n; i ++) {
        for(int j = 0; j < n; j ++) {
            if(i != j && p[i][j] == 1) {
                if(get_root(i) != get_root(j))
                    return 0;
            }
 
            if(i != j && p[i][j] == 0) {
                if(get_root(i) == get_root(j))
                    return 0;
            }
        }
    }
 
    for(int i = 0; i < n; i ++) {
        if(get_root(i) != i) continue ;
 
        vector<int> a;
 
        for(int j = 0; j < n; j ++) {
            if(i == j || p[i][j] != 2) continue ;
 
            if(mark[j]) return 0;
            a.push_back(j);
        }
 
        if(a.empty()) continue ;
 
        vector<int> b;
        b.push_back(i);
 
        for(int j = 0; j < a.size(); j ++) {
            if(unite(b.back(), a[j])) {
                answer[b.back()][a[j]] = 1;
                answer[a[j]][b.back()] = 1;
 
                b.push_back(a[j]);
            }
        }
 
        if(b.size() <= 2) return 0;
 
        answer[i][b.back()] = 1;
        answer[b.back()][i] = 1;
 
        for(int j = 0; j < n; j ++) {
            if(get_root(i) == get_root(j)) {
                mark[j] = true;
            }
        }
    }
 
    for(int i = 0; i < n; i ++) {
        for(int j = 0; j < n; j ++) {
            if(i != j && p[i][j] == 2) {
                if(get_root(i) != get_root(j) || mark[get_root(i)] == false)
                    return 0;
            }
 
            if(i != j && p[i][j] == 0) {
                if(get_root(i) == get_root(j))
                    return 0;
            }
        }
    }
    
    for(int i = 0; i < n; i ++) {
        for(int j = 0; j < n; j ++) {
            if(p[i][j] == 3) return 0;
        }
    }
 	
  	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:40:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for(int j = 0; j < a.size(); j ++) {
      |                        ~~^~~~~~~~~~
supertrees.cpp:79:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |         for(int j = 0; j < a.size(); j ++) {
      |                        ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 162 ms 22164 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 162 ms 22164 KB Output is correct
8 Correct 1 ms 344 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 348 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 180 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 69 ms 12112 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 41 ms 5768 KB Output is correct
21 Correct 165 ms 22096 KB Output is correct
22 Correct 162 ms 22096 KB Output is correct
23 Correct 190 ms 22100 KB Output is correct
24 Correct 161 ms 22096 KB Output is correct
25 Correct 58 ms 12112 KB Output is correct
26 Correct 62 ms 12052 KB Output is correct
27 Correct 166 ms 22096 KB Output is correct
28 Correct 159 ms 22096 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 492 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 7 ms 1116 KB Output is correct
9 Correct 156 ms 22096 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 156 ms 22112 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 67 ms 12116 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 41 ms 5708 KB Output is correct
22 Correct 159 ms 22036 KB Output is correct
23 Correct 162 ms 22096 KB Output is correct
24 Correct 173 ms 22236 KB Output is correct
25 Correct 59 ms 12036 KB Output is correct
26 Correct 61 ms 12112 KB Output is correct
27 Correct 176 ms 22096 KB Output is correct
28 Correct 169 ms 22096 KB Output is correct
29 Correct 60 ms 12112 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 44 ms 5772 KB Output is correct
5 Correct 164 ms 22024 KB Output is correct
6 Correct 161 ms 22024 KB Output is correct
7 Correct 166 ms 22096 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 40 ms 5712 KB Output is correct
10 Correct 161 ms 22096 KB Output is correct
11 Correct 160 ms 22148 KB Output is correct
12 Correct 169 ms 21980 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 344 KB Output is correct
16 Correct 42 ms 5816 KB Output is correct
17 Correct 162 ms 22096 KB Output is correct
18 Correct 166 ms 22096 KB Output is correct
19 Correct 161 ms 22096 KB Output is correct
20 Correct 160 ms 22092 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 162 ms 22164 KB Output is correct
8 Correct 1 ms 344 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 348 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 180 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 69 ms 12112 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 41 ms 5768 KB Output is correct
21 Correct 165 ms 22096 KB Output is correct
22 Correct 162 ms 22096 KB Output is correct
23 Correct 190 ms 22100 KB Output is correct
24 Correct 161 ms 22096 KB Output is correct
25 Correct 58 ms 12112 KB Output is correct
26 Correct 62 ms 12052 KB Output is correct
27 Correct 166 ms 22096 KB Output is correct
28 Correct 159 ms 22096 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 492 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1116 KB Output is correct
37 Correct 156 ms 22096 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 7 ms 1112 KB Output is correct
41 Correct 156 ms 22112 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 600 KB Output is correct
44 Correct 3 ms 856 KB Output is correct
45 Correct 67 ms 12116 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 1 ms 344 KB Output is correct
48 Correct 0 ms 344 KB Output is correct
49 Correct 41 ms 5708 KB Output is correct
50 Correct 159 ms 22036 KB Output is correct
51 Correct 162 ms 22096 KB Output is correct
52 Correct 173 ms 22236 KB Output is correct
53 Correct 59 ms 12036 KB Output is correct
54 Correct 61 ms 12112 KB Output is correct
55 Correct 176 ms 22096 KB Output is correct
56 Correct 169 ms 22096 KB Output is correct
57 Correct 60 ms 12112 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 0 ms 412 KB Output is correct
60 Correct 3 ms 1112 KB Output is correct
61 Correct 65 ms 12112 KB Output is correct
62 Correct 0 ms 344 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 0 ms 344 KB Output is correct
65 Correct 43 ms 5716 KB Output is correct
66 Correct 62 ms 12056 KB Output is correct
67 Correct 58 ms 12132 KB Output is correct
68 Correct 63 ms 12112 KB Output is correct
69 Correct 60 ms 12112 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 7 ms 1112 KB Output is correct
7 Correct 162 ms 22164 KB Output is correct
8 Correct 1 ms 344 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 348 KB Output is correct
12 Correct 7 ms 1112 KB Output is correct
13 Correct 180 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 69 ms 12112 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 41 ms 5768 KB Output is correct
21 Correct 165 ms 22096 KB Output is correct
22 Correct 162 ms 22096 KB Output is correct
23 Correct 190 ms 22100 KB Output is correct
24 Correct 161 ms 22096 KB Output is correct
25 Correct 58 ms 12112 KB Output is correct
26 Correct 62 ms 12052 KB Output is correct
27 Correct 166 ms 22096 KB Output is correct
28 Correct 159 ms 22096 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 492 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1116 KB Output is correct
37 Correct 156 ms 22096 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 7 ms 1112 KB Output is correct
41 Correct 156 ms 22112 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 600 KB Output is correct
44 Correct 3 ms 856 KB Output is correct
45 Correct 67 ms 12116 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 1 ms 344 KB Output is correct
48 Correct 0 ms 344 KB Output is correct
49 Correct 41 ms 5708 KB Output is correct
50 Correct 159 ms 22036 KB Output is correct
51 Correct 162 ms 22096 KB Output is correct
52 Correct 173 ms 22236 KB Output is correct
53 Correct 59 ms 12036 KB Output is correct
54 Correct 61 ms 12112 KB Output is correct
55 Correct 176 ms 22096 KB Output is correct
56 Correct 169 ms 22096 KB Output is correct
57 Correct 60 ms 12112 KB Output is correct
58 Correct 1 ms 344 KB Output is correct
59 Correct 1 ms 344 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 44 ms 5772 KB Output is correct
62 Correct 164 ms 22024 KB Output is correct
63 Correct 161 ms 22024 KB Output is correct
64 Correct 166 ms 22096 KB Output is correct
65 Correct 1 ms 348 KB Output is correct
66 Correct 40 ms 5712 KB Output is correct
67 Correct 161 ms 22096 KB Output is correct
68 Correct 160 ms 22148 KB Output is correct
69 Correct 169 ms 21980 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 344 KB Output is correct
73 Correct 42 ms 5816 KB Output is correct
74 Correct 162 ms 22096 KB Output is correct
75 Correct 166 ms 22096 KB Output is correct
76 Correct 161 ms 22096 KB Output is correct
77 Correct 160 ms 22092 KB Output is correct
78 Correct 0 ms 344 KB Output is correct
79 Correct 0 ms 412 KB Output is correct
80 Correct 3 ms 1112 KB Output is correct
81 Correct 65 ms 12112 KB Output is correct
82 Correct 0 ms 344 KB Output is correct
83 Correct 0 ms 344 KB Output is correct
84 Correct 0 ms 344 KB Output is correct
85 Correct 43 ms 5716 KB Output is correct
86 Correct 62 ms 12056 KB Output is correct
87 Correct 58 ms 12132 KB Output is correct
88 Correct 63 ms 12112 KB Output is correct
89 Correct 60 ms 12112 KB Output is correct
90 Correct 0 ms 344 KB Output is correct
91 Correct 1 ms 344 KB Output is correct
92 Correct 3 ms 856 KB Output is correct
93 Correct 65 ms 12112 KB Output is correct
94 Correct 1 ms 344 KB Output is correct
95 Correct 0 ms 344 KB Output is correct
96 Correct 0 ms 344 KB Output is correct
97 Correct 17 ms 3160 KB Output is correct
98 Correct 67 ms 12112 KB Output is correct
99 Correct 70 ms 12112 KB Output is correct
100 Correct 70 ms 12048 KB Output is correct
101 Correct 65 ms 12112 KB Output is correct
102 Correct 61 ms 12112 KB Output is correct
103 Correct 60 ms 14156 KB Output is correct
104 Correct 73 ms 14160 KB Output is correct
105 Correct 77 ms 14160 KB Output is correct