oj.uz

Submission #301195

# Submission time Handle Problem Language Result Execution time Memory
301195 2020-09-17T17:34:45 Z rocks03 Connecting Supertrees (IOI20_supertrees) C++14
40 / 100
 262 ms 22148 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
#define pb push_back
#define SZ(x) ((int) (x).size())
using namespace std;

void build(vector<vector<int>> _b);

const int MAXN = 1e3+100;
int p[MAXN], sz[MAXN];
void init(int n){
    iota(p, p+n, 0);
    fill(sz, sz+n, 1);
}
int find_parent(int x){
    if(x == p[x])
        return x;
    return p[x] = find_parent(p[x]);
}
bool same_set(int a, int b){
    return (find_parent(a) == find_parent(b));
}
void union_set(int a, int b){
    a = find_parent(a);
    b = find_parent(b);
    if(a == b)
        return;
    if(sz[a] < sz[b])
        swap(a, b);
    p[b] = a;
    sz[a] += sz[b];
}
int p2[MAXN], sz2[MAXN];
void init2(int n){
    iota(p2, p2+n, 0);
    fill(sz2, sz2+n, 1);
}
int find2(int x){
    if(x == p2[x])
        return x;
    return p2[x] = find2(p2[x]);
}
bool same2(int a, int b){
    return (find2(a) == find2(b));
}
void union2(int a, int b){
    a = find2(a);
    b = find2(b);
    if(a == b)
        return;
    if(sz2[a] < sz2[b])
        swap(a, b);
    p2[b] = a;
    sz2[a] += sz2[b];
}

int construct(vector<vector<int>> p){
    int N = SZ(p);
    init(N);
    for(int i = 0; i < N; i++){
        for(int j = 0; j < N; j++){
            if(p[i][j] > 0){
                union_set(i, j);
            }
        }
    }
    vector<vector<int>> ans(N, vector<int>(N, 0));
    vector<bool> vis(N, false);
    vector<bool> vis2(N, false), vis3(N, false);
    init2(N);
    for(int i = 0; i < N; i++){
        int v = find_parent(i);
        if(!vis[v]){
            vis[v] = true;
            vector<int> vertici;
            vertici.pb(i);
            for(int j = i+1; j < N; j++){
                if(same_set(i, j)){
                    vertici.pb(j);
                }
            }

            for(int j = 0; j < SZ(vertici); j++){
                for(int k = 0; k < SZ(vertici); k++){
                    if(p[vertici[j]][vertici[k]] == 0){
                        return 0;
                    }
                }
            }
            if(SZ(vertici) == 2 && p[vertici[0]][vertici[1]] >= 2){
                return 0;
            }

            bool onlyone = true;
            for(int j = 0; j < SZ(vertici); j++){
                for(int k = 0; k < SZ(vertici); k++){
                    if(p[vertici[j]][vertici[k]] != 1){
                        onlyone = false;
                    }
                }
            }
            if(onlyone){
                for(int j = 1; j < SZ(vertici); j++){
                    ans[vertici[j-1]][vertici[j]] = 1;
                    ans[vertici[j]][vertici[j-1]] = 1;
                }
                continue;
            }

            for(int j = 0; j < SZ(vertici); j++){
                for(int k = j + 1; k < SZ(vertici); k++){
                    int v1 = vertici[j], v2 = vertici[k];
                    if(p[v1][v2] == 1){
                        union2(v1, v2);
                        vis3[find2(v1)] = true;
                    }
                }
            }
            vector<set<int>> vs;
            for(int j = 0; j < SZ(vertici); j++){
                int root = find2(vertici[j]);
                if(vis2[root] || !vis3[root]) continue;
                vis2[root] = true;
                set<int> nuovo;
                nuovo.insert(vertici[j]);
                for(int k = j+1; k < SZ(vertici); k++){
                    if(same2(vertici[j], vertici[k])){
                        nuovo.insert(vertici[k]);
                    }
                }
                vs.pb(nuovo);
            }
            set<int> c;
            for(auto x : vertici){
                int root = find2(x);
                if(!vis2[root]){
                    c.insert(x);
                }
            }
            if(!SZ(vs)){
                if(SZ(c) < 3) return 0;
                int last = -1;
                for(auto x : c){
                    if(last != -1){
                        ans[last][x] = ans[x][last] = 1;
                    }
                    last = x;
                }
                ans[*c.begin()][*c.rbegin()] = ans[*c.rbegin()][*c.begin()] = 1;
                continue;
            }
            if(!SZ(c)){
                if(SZ(vs) < 3)
                    return 0;
                for(int ind = 0; ind < SZ(vs); ind++){
                    int j = (ind - 1 + SZ(vs)) % (SZ(vs));
                    int da = *vs[j].rbegin(), a = *vs[ind].begin();
                    ans[da][a] = ans[a][da] = 1;
                    int last = -1;
                    for(auto x : vs[ind]){
                        if(last != -1){
                            ans[last][x] = ans[x][last] = 1;
                        }
                        last = x;
                    }
                }
                continue;
            }
            if(SZ(c) == 1){
                if(SZ(vs) < 2) return 0;
                int v1 = -1, v2 = -1, ind1 = -1, ind2 = -1;
                for(int ind = 0; ind < SZ(vs); ind++){
                    for(auto x : vs[ind]){
                        bool good = false;
                        for(int j = 0; j < N; j++){
                            if(!same2(x, j) && p[x][j] != 2){
                                good = false;
                                break;
                            }
                        }
                        if(good){
                            if(v1 == -1){
                                v1 = x;
                                ind1 = ind;
                            } else{
                                v2 = x;
                                ind2 = ind;
                            }
                            vs[ind].erase(x);
                            break;
                        }
                    }
                    if(v2 != -1) break;
                }
                if(ind1 == -1 || ind2 == -1)
                    return 0;
                for(int ind = 0; ind < SZ(vs); ind++){
                    int last = -1;
                    for(auto x : vs[ind]){
                        if(last != -1){
                            ans[last][x] = ans[x][last] = 1;
                        }
                        last = x;
                    }
                    if(ind != ind1 && ind != ind2)
                        ans[last][*c.begin()] = ans[*c.begin()][last] = 1;
                    else if(ind == ind1){
                        if(last != -1)
                            ans[last][v1] = ans[v1][last] = 1;
                    } else if(ind != ind2){
                            if(last != -1)
                                ans[last][v2] = ans[v2][last] = 1;
                        }
                }
                ans[*c.begin()][v1] = ans[v1][*c.begin()] = 1;
                ans[*c.begin()][v2] = ans[v2][*c.begin()] = 1;
                ans[v1][v2] = ans[v2][v1] = 1;
                continue;
            }
            if(SZ(c) > 1){
                for(int ind = 0; ind < SZ(vs); ind++){
                    int last = -1;
                    for(auto x : vs[ind]){
                        if(last != -1){
                            ans[last][x] = ans[x][last] = 1;
                        }
                        last = x;
                    }
                    ans[last][*c.begin()] = ans[*c.begin()][last] = 1;
                }
                int last = -1;
                for(auto x : c){
                    if(last != -1){
                        ans[last][x] = ans[x][last] = 1;
                    }
                    last = x;
                }
                ans[*c.rbegin()][*vs[0].rbegin()] = ans[*vs[0].rbegin()][*c.rbegin()] = 1;
                continue;
            }
        }
    }
    build(ans);
    return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 237 ms 22100 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 237 ms 22100 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 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 231 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 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 384 KB Output is correct
20 Correct 59 ms 5880 KB Output is correct
21 Correct 233 ms 22104 KB Output is correct
22 Correct 248 ms 22136 KB Output is correct
23 Correct 246 ms 22136 KB Output is correct
24 Correct 232 ms 22136 KB Output is correct
25 Correct 98 ms 12152 KB Output is correct
26 Correct 102 ms 12152 KB Output is correct
27 Correct 262 ms 22132 KB Output is correct
28 Correct 242 ms 22136 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 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 1280 KB Output is correct
9 Correct 237 ms 22136 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 243 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 12120 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 256 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 64 ms 5880 KB Output is correct
22 Correct 235 ms 22136 KB Output is correct
23 Correct 231 ms 22136 KB Output is correct
24 Correct 253 ms 22136 KB Output is correct
25 Correct 96 ms 12152 KB Output is correct
26 Correct 102 ms 12152 KB Output is correct
27 Correct 239 ms 22136 KB Output is correct
28 Correct 262 ms 22136 KB Output is correct
29 Correct 98 ms 12152 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 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 61 ms 5880 KB Output is correct
5 Correct 237 ms 22148 KB Output is correct
6 Correct 235 ms 22136 KB Output is correct
7 Correct 256 ms 22136 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 59 ms 5836 KB Output is correct
10 Correct 244 ms 22136 KB Output is correct
11 Correct 234 ms 22136 KB Output is correct
12 Correct 257 ms 22136 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Incorrect 24 ms 3328 KB Answer gives possible 0 while actual possible 1
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 237 ms 22100 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 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 231 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 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 384 KB Output is correct
20 Correct 59 ms 5880 KB Output is correct
21 Correct 233 ms 22104 KB Output is correct
22 Correct 248 ms 22136 KB Output is correct
23 Correct 246 ms 22136 KB Output is correct
24 Correct 232 ms 22136 KB Output is correct
25 Correct 98 ms 12152 KB Output is correct
26 Correct 102 ms 12152 KB Output is correct
27 Correct 262 ms 22132 KB Output is correct
28 Correct 242 ms 22136 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 0 ms 384 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 1280 KB Output is correct
37 Correct 237 ms 22136 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 384 KB Output is correct
40 Correct 10 ms 1280 KB Output is correct
41 Correct 243 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 12120 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 0 ms 256 KB Output is correct
48 Correct 0 ms 384 KB Output is correct
49 Correct 64 ms 5880 KB Output is correct
50 Correct 235 ms 22136 KB Output is correct
51 Correct 231 ms 22136 KB Output is correct
52 Correct 253 ms 22136 KB Output is correct
53 Correct 96 ms 12152 KB Output is correct
54 Correct 102 ms 12152 KB Output is correct
55 Correct 239 ms 22136 KB Output is correct
56 Correct 262 ms 22136 KB Output is correct
57 Correct 98 ms 12152 KB Output is correct
58 Correct 1 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 107 ms 12248 KB Output is correct
62 Correct 1 ms 384 KB Output is correct
63 Correct 0 ms 256 KB Output is correct
64 Correct 1 ms 384 KB Output is correct
65 Incorrect 24 ms 3320 KB Answer gives possible 0 while actual possible 1
66 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 237 ms 22100 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 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 231 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 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 384 KB Output is correct
20 Correct 59 ms 5880 KB Output is correct
21 Correct 233 ms 22104 KB Output is correct
22 Correct 248 ms 22136 KB Output is correct
23 Correct 246 ms 22136 KB Output is correct
24 Correct 232 ms 22136 KB Output is correct
25 Correct 98 ms 12152 KB Output is correct
26 Correct 102 ms 12152 KB Output is correct
27 Correct 262 ms 22132 KB Output is correct
28 Correct 242 ms 22136 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 0 ms 384 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 1280 KB Output is correct
37 Correct 237 ms 22136 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 384 KB Output is correct
40 Correct 10 ms 1280 KB Output is correct
41 Correct 243 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 12120 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 0 ms 256 KB Output is correct
48 Correct 0 ms 384 KB Output is correct
49 Correct 64 ms 5880 KB Output is correct
50 Correct 235 ms 22136 KB Output is correct
51 Correct 231 ms 22136 KB Output is correct
52 Correct 253 ms 22136 KB Output is correct
53 Correct 96 ms 12152 KB Output is correct
54 Correct 102 ms 12152 KB Output is correct
55 Correct 239 ms 22136 KB Output is correct
56 Correct 262 ms 22136 KB Output is correct
57 Correct 98 ms 12152 KB Output is correct
58 Correct 0 ms 256 KB Output is correct
59 Correct 0 ms 384 KB Output is correct
60 Correct 0 ms 384 KB Output is correct
61 Correct 61 ms 5880 KB Output is correct
62 Correct 237 ms 22148 KB Output is correct
63 Correct 235 ms 22136 KB Output is correct
64 Correct 256 ms 22136 KB Output is correct
65 Correct 0 ms 384 KB Output is correct
66 Correct 59 ms 5836 KB Output is correct
67 Correct 244 ms 22136 KB Output is correct
68 Correct 234 ms 22136 KB Output is correct
69 Correct 257 ms 22136 KB Output is correct
70 Correct 1 ms 384 KB Output is correct
71 Correct 0 ms 384 KB Output is correct
72 Correct 0 ms 256 KB Output is correct
73 Incorrect 24 ms 3328 KB Answer gives possible 0 while actual possible 1
74 Halted 0 ms 0 KB -