oj.uz

Submission #301316

# Submission time Handle Problem Language Result Execution time Memory
301316 2020-09-17T20:48:18 Z Gilgamesh Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 262 ms 22264 KB 
#include "supertrees.h"
#include <vector>

const int mxN = 1000;

int parent[mxN];
int rnk[mxN];

int find(int x) 
{ 
    if(parent[x] == -1)
        parent[x] = x;
    if (parent[x] != x) { 
        parent[x] = find(parent[x]); 
    }
    return parent[x]; 
}
bool merge(int x, int y) 
{ 
    int xRoot = find(x), yRoot = find(y); 
    if (xRoot == yRoot) 
        return false; 
    if (rnk[xRoot] < rnk[yRoot]) 
        parent[xRoot] = yRoot; 
    else if (rnk[yRoot] < rnk[xRoot]) 
        parent[yRoot] = xRoot; 
    else 
    { 
        parent[yRoot] = xRoot; 
        rnk[xRoot] = rnk[xRoot] + 1; 
    } 
    return true;
} 

int construct(std::vector<std::vector<int>> p) {
    int n = p.size();
    std::vector<std::vector<int>> answer;
    for (int i = 0; i < n; i++) {
        std::vector<int> row;
        row.resize(n);
        answer.push_back(row);
    }
    bool zero = false, one = false, two = false, three = false;
    for(int i = 0; i < n; ++i){
        for(int j = 0; j < n; ++j){
            if(p[i][j] == 0) zero = true;
            else if(p[i][j] == 1) one = true;
            else if(p[i][j] == 2) two = true;
            else three = true;
        }
    }
    for(int i = 0; i < n; ++i){
        parent[i] = i;
    }
    if(two){
        for(int i = 0; i < n; ++i){
            for(int j = i + 1; j < n; ++j){
                if(!p[i][j] && find(i) == find(j)){
                    return 0;
                }
                if(p[i][j]) merge(i, j);
            }
        }
        for(int i = 0; i < n; ++i){
            for(int j = i + 1; j < n; ++j){
                if(!p[i][j] && find(i) == find(j)) return 0;
            }
        }
        std::vector<int> sets[n];
        for(int i = 0; i < n; ++i){
            int rep = find(i);
            sets[rep].emplace_back(i);
        }
        for(int i = 0; i < n; ++i){
            int sz = sets[i].size();
            if(sz == 2) return 0;
            for(int j = 0; j < sz - 1; ++j){
                answer[sets[i][j]][sets[i][j + 1]] = 1;
                answer[sets[i][j + 1]][sets[i][j]] = 1;
            }
            if(sz > 1){
                answer[sets[i][0]][sets[i][sz-1]] = 1;
                answer[sets[i][sz-1]][sets[i][0]] = 1;
            }
        }
    }
    else {
        for(int i = 0; i < n; ++i){
            for(int j = i + 1; j < n; ++j){
                if(!p[i][j] && find(i) == find(j)){
                    return 0;
                }
                if(p[i][j]) merge(i, j);
            }
        }
        for(int i = 0; i < n; ++i){
            for(int j = i + 1; j < n; ++j){
                if(!p[i][j] && find(i) == find(j)) return 0;
            }
        }
        for(int i = 0; i < n; ++i){
            int rep = find(i);
            if(rep == i) continue;
            answer[rep][i] = 1;
            answer[i][rep] = 1;
        }
    }
    build(answer);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:43:10: warning: variable 'zero' set but not used [-Wunused-but-set-variable]
   43 |     bool zero = false, one = false, two = false, three = false;
      |          ^~~~
supertrees.cpp:43:24: warning: variable 'one' set but not used [-Wunused-but-set-variable]
   43 |     bool zero = false, one = false, two = false, three = false;
      |                        ^~~
supertrees.cpp:43:50: warning: variable 'three' set but not used [-Wunused-but-set-variable]
   43 |     bool zero = false, one = false, two = false, three = false;
      |                                                  ^~~~~

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 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 250 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 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 250 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 236 ms 22096 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 110 ms 12152 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 60 ms 5752 KB Output is correct
21 Correct 240 ms 22264 KB Output is correct
22 Correct 236 ms 22136 KB Output is correct
23 Correct 259 ms 22136 KB Output is correct
24 Correct 234 ms 22136 KB Output is correct
25 Correct 110 ms 12152 KB Output is correct
26 Correct 99 ms 12152 KB Output is correct
27 Correct 256 ms 22136 KB Output is correct
28 Correct 243 ms 22136 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 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 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 10 ms 1152 KB Output is correct
9 Correct 234 ms 22136 KB Output is correct
10 Correct 0 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 250 ms 22136 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 111 ms 12108 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 61 ms 5752 KB Output is correct
22 Correct 252 ms 22136 KB Output is correct
23 Correct 240 ms 22264 KB Output is correct
24 Correct 254 ms 22136 KB Output is correct
25 Correct 106 ms 12152 KB Output is correct
26 Correct 101 ms 12152 KB Output is correct
27 Correct 250 ms 22140 KB Output is correct
28 Correct 262 ms 22136 KB Output is correct
29 Correct 106 ms 12236 KB Output is correct

Subtask #4
0 / 35.0

# 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 62 ms 5752 KB Output is correct
5 Correct 242 ms 22136 KB Output is correct
6 Correct 243 ms 22136 KB Output is correct
7 Correct 257 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 60 ms 5752 KB Output is correct
10 Correct 246 ms 22136 KB Output is correct
11 Correct 255 ms 22112 KB Output is correct
12 Correct 257 ms 22136 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Incorrect 0 ms 256 KB Too many ways to get from 4 to 8, should be 1 found no less than 2
15 Halted 0 ms 0 KB -

Subtask #5
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 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 250 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 236 ms 22096 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 110 ms 12152 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 60 ms 5752 KB Output is correct
21 Correct 240 ms 22264 KB Output is correct
22 Correct 236 ms 22136 KB Output is correct
23 Correct 259 ms 22136 KB Output is correct
24 Correct 234 ms 22136 KB Output is correct
25 Correct 110 ms 12152 KB Output is correct
26 Correct 99 ms 12152 KB Output is correct
27 Correct 256 ms 22136 KB Output is correct
28 Correct 243 ms 22136 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 0 ms 256 KB Output is correct
36 Correct 10 ms 1152 KB Output is correct
37 Correct 234 ms 22136 KB Output is correct
38 Correct 0 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 250 ms 22136 KB Output is correct
42 Correct 0 ms 256 KB Output is correct
43 Correct 0 ms 256 KB Output is correct
44 Correct 5 ms 768 KB Output is correct
45 Correct 111 ms 12108 KB Output is correct
46 Correct 0 ms 256 KB Output is correct
47 Correct 0 ms 256 KB Output is correct
48 Correct 0 ms 256 KB Output is correct
49 Correct 61 ms 5752 KB Output is correct
50 Correct 252 ms 22136 KB Output is correct
51 Correct 240 ms 22264 KB Output is correct
52 Correct 254 ms 22136 KB Output is correct
53 Correct 106 ms 12152 KB Output is correct
54 Correct 101 ms 12152 KB Output is correct
55 Correct 250 ms 22140 KB Output is correct
56 Correct 262 ms 22136 KB Output is correct
57 Correct 106 ms 12236 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 768 KB Output is correct
61 Correct 113 ms 12152 KB Output is correct
62 Correct 0 ms 256 KB Output is correct
63 Incorrect 0 ms 256 KB Too many ways to get from 0 to 9, should be 1 found no less than 2
64 Halted 0 ms 0 KB -

Subtask #6
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 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 250 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 236 ms 22096 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 110 ms 12152 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 60 ms 5752 KB Output is correct
21 Correct 240 ms 22264 KB Output is correct
22 Correct 236 ms 22136 KB Output is correct
23 Correct 259 ms 22136 KB Output is correct
24 Correct 234 ms 22136 KB Output is correct
25 Correct 110 ms 12152 KB Output is correct
26 Correct 99 ms 12152 KB Output is correct
27 Correct 256 ms 22136 KB Output is correct
28 Correct 243 ms 22136 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 0 ms 256 KB Output is correct
36 Correct 10 ms 1152 KB Output is correct
37 Correct 234 ms 22136 KB Output is correct
38 Correct 0 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 250 ms 22136 KB Output is correct
42 Correct 0 ms 256 KB Output is correct
43 Correct 0 ms 256 KB Output is correct
44 Correct 5 ms 768 KB Output is correct
45 Correct 111 ms 12108 KB Output is correct
46 Correct 0 ms 256 KB Output is correct
47 Correct 0 ms 256 KB Output is correct
48 Correct 0 ms 256 KB Output is correct
49 Correct 61 ms 5752 KB Output is correct
50 Correct 252 ms 22136 KB Output is correct
51 Correct 240 ms 22264 KB Output is correct
52 Correct 254 ms 22136 KB Output is correct
53 Correct 106 ms 12152 KB Output is correct
54 Correct 101 ms 12152 KB Output is correct
55 Correct 250 ms 22140 KB Output is correct
56 Correct 262 ms 22136 KB Output is correct
57 Correct 106 ms 12236 KB Output is correct
58 Correct 0 ms 256 KB Output is correct
59 Correct 0 ms 256 KB Output is correct
60 Correct 0 ms 256 KB Output is correct
61 Correct 62 ms 5752 KB Output is correct
62 Correct 242 ms 22136 KB Output is correct
63 Correct 243 ms 22136 KB Output is correct
64 Correct 257 ms 22136 KB Output is correct
65 Correct 0 ms 256 KB Output is correct
66 Correct 60 ms 5752 KB Output is correct
67 Correct 246 ms 22136 KB Output is correct
68 Correct 255 ms 22112 KB Output is correct
69 Correct 257 ms 22136 KB Output is correct
70 Correct 0 ms 256 KB Output is correct
71 Incorrect 0 ms 256 KB Too many ways to get from 4 to 8, should be 1 found no less than 2
72 Halted 0 ms 0 KB -