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Submission #301517

# Submission time Handle Problem Language Result Execution time Memory
301517 2020-09-18T03:39:18 Z Gilgamesh Connecting Supertrees (IOI20_supertrees) C++17
75 / 100
 268 ms 22296 KB 
#include "supertrees.h"
#include <vector>
#include <set>
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 = i + 1; 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(!one && !three){
        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 if(!two && !three){
        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;
        }
    }
    else if(!three){
        for(int i = 0; i < n; ++i){
            for(int j = i + 1; j < n; ++j){
                if(p[i][j]) merge(i, j);
            }
        }
        std::set<int> sets[mxN];
        for(int i = 0; i < n; ++i){
            int rep = find(i);
            sets[rep].insert(i);
        }
        for(int rep = 0; rep < n; ++rep){
            if(sets[rep].size() < 2) continue;
            std::vector<int> circle;
            std::set<int> remove;
            for(int i : sets[rep]){
                if(remove.find(i) != remove.end()) continue;
                for(int j = 0; j < n; ++j){
                    if(j == i) continue;
                    if(p[i][j] == 1){
                        answer[i][j] = 1;
                        answer[j][i] = 1;
                        remove.insert(j);
                    }
                }
                circle.emplace_back(i);
            }
            int sz = circle.size();
            for(int i = 0; i < sz - 1; ++i){
                answer[circle[i]][circle[i + 1]] = 1;
                answer[circle[i + 1]][circle[i]] = 1;
            }
            if(sz > 1){
                answer[circle[0]][circle[sz-1]] = 1;
                answer[circle[sz-1]][circle[0]] = 1;
            }
        }
    }
    build(answer);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:44:10: warning: variable 'zero' set but not used [-Wunused-but-set-variable]
   44 |     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 244 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 244 ms 22136 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 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 237 ms 22136 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 107 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 61 ms 5752 KB Output is correct
21 Correct 242 ms 22136 KB Output is correct
22 Correct 248 ms 22136 KB Output is correct
23 Correct 258 ms 22136 KB Output is correct
24 Correct 250 ms 22220 KB Output is correct
25 Correct 100 ms 12240 KB Output is correct
26 Correct 100 ms 12152 KB Output is correct
27 Correct 259 ms 22264 KB Output is correct
28 Correct 239 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 0 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 10 ms 1152 KB Output is correct
9 Correct 237 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 10 ms 1280 KB Output is correct
13 Correct 252 ms 22168 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 106 ms 12152 KB Output is correct
18 Correct 1 ms 512 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 65 ms 5828 KB Output is correct
22 Correct 247 ms 22136 KB Output is correct
23 Correct 249 ms 22136 KB Output is correct
24 Correct 256 ms 22296 KB Output is correct
25 Correct 103 ms 12152 KB Output is correct
26 Correct 95 ms 12152 KB Output is correct
27 Correct 242 ms 22136 KB Output is correct
28 Correct 254 ms 22264 KB Output is correct
29 Correct 101 ms 12280 KB Output is correct

Subtask #4
35.0 / 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 1 ms 384 KB Output is correct
4 Correct 64 ms 5752 KB Output is correct
5 Correct 255 ms 22140 KB Output is correct
6 Correct 248 ms 22136 KB Output is correct
7 Correct 268 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 62 ms 5880 KB Output is correct
10 Correct 244 ms 22264 KB Output is correct
11 Correct 243 ms 22136 KB Output is correct
12 Correct 259 ms 22136 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 59 ms 5880 KB Output is correct
17 Correct 252 ms 22136 KB Output is correct
18 Correct 241 ms 22136 KB Output is correct
19 Correct 236 ms 22136 KB Output is correct
20 Correct 238 ms 22136 KB Output is correct

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 244 ms 22136 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 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 237 ms 22136 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 107 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 61 ms 5752 KB Output is correct
21 Correct 242 ms 22136 KB Output is correct
22 Correct 248 ms 22136 KB Output is correct
23 Correct 258 ms 22136 KB Output is correct
24 Correct 250 ms 22220 KB Output is correct
25 Correct 100 ms 12240 KB Output is correct
26 Correct 100 ms 12152 KB Output is correct
27 Correct 259 ms 22264 KB Output is correct
28 Correct 239 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 0 ms 256 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 0 ms 384 KB Output is correct
36 Correct 10 ms 1152 KB Output is correct
37 Correct 237 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 10 ms 1280 KB Output is correct
41 Correct 252 ms 22168 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 256 KB Output is correct
44 Correct 5 ms 768 KB Output is correct
45 Correct 106 ms 12152 KB Output is correct
46 Correct 1 ms 512 KB Output is correct
47 Correct 0 ms 384 KB Output is correct
48 Correct 0 ms 256 KB Output is correct
49 Correct 65 ms 5828 KB Output is correct
50 Correct 247 ms 22136 KB Output is correct
51 Correct 249 ms 22136 KB Output is correct
52 Correct 256 ms 22296 KB Output is correct
53 Correct 103 ms 12152 KB Output is correct
54 Correct 95 ms 12152 KB Output is correct
55 Correct 242 ms 22136 KB Output is correct
56 Correct 254 ms 22264 KB Output is correct
57 Correct 101 ms 12280 KB Output is correct
58 Incorrect 1 ms 384 KB Answer gives possible 1 while actual possible 0
59 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 244 ms 22136 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 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 237 ms 22136 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 5 ms 768 KB Output is correct
17 Correct 107 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 61 ms 5752 KB Output is correct
21 Correct 242 ms 22136 KB Output is correct
22 Correct 248 ms 22136 KB Output is correct
23 Correct 258 ms 22136 KB Output is correct
24 Correct 250 ms 22220 KB Output is correct
25 Correct 100 ms 12240 KB Output is correct
26 Correct 100 ms 12152 KB Output is correct
27 Correct 259 ms 22264 KB Output is correct
28 Correct 239 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 0 ms 256 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 0 ms 384 KB Output is correct
36 Correct 10 ms 1152 KB Output is correct
37 Correct 237 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 10 ms 1280 KB Output is correct
41 Correct 252 ms 22168 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 256 KB Output is correct
44 Correct 5 ms 768 KB Output is correct
45 Correct 106 ms 12152 KB Output is correct
46 Correct 1 ms 512 KB Output is correct
47 Correct 0 ms 384 KB Output is correct
48 Correct 0 ms 256 KB Output is correct
49 Correct 65 ms 5828 KB Output is correct
50 Correct 247 ms 22136 KB Output is correct
51 Correct 249 ms 22136 KB Output is correct
52 Correct 256 ms 22296 KB Output is correct
53 Correct 103 ms 12152 KB Output is correct
54 Correct 95 ms 12152 KB Output is correct
55 Correct 242 ms 22136 KB Output is correct
56 Correct 254 ms 22264 KB Output is correct
57 Correct 101 ms 12280 KB Output is correct
58 Correct 0 ms 256 KB Output is correct
59 Correct 0 ms 256 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 64 ms 5752 KB Output is correct
62 Correct 255 ms 22140 KB Output is correct
63 Correct 248 ms 22136 KB Output is correct
64 Correct 268 ms 22136 KB Output is correct
65 Correct 0 ms 256 KB Output is correct
66 Correct 62 ms 5880 KB Output is correct
67 Correct 244 ms 22264 KB Output is correct
68 Correct 243 ms 22136 KB Output is correct
69 Correct 259 ms 22136 KB Output is correct
70 Correct 0 ms 256 KB Output is correct
71 Correct 0 ms 384 KB Output is correct
72 Correct 1 ms 384 KB Output is correct
73 Correct 59 ms 5880 KB Output is correct
74 Correct 252 ms 22136 KB Output is correct
75 Correct 241 ms 22136 KB Output is correct
76 Correct 236 ms 22136 KB Output is correct
77 Correct 238 ms 22136 KB Output is correct
78 Incorrect 1 ms 384 KB Answer gives possible 1 while actual possible 0
79 Halted 0 ms 0 KB -