oj.uz

Submission #301172

# Submission time Handle Problem Language Result Execution time Memory
301172 2020-09-17T17:18:14 Z rocks03 Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 248 ms 22264 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(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){
                return 0;
            }
            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 0 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 248 ms 22264 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 248 ms 22264 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 230 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 116 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 58 ms 5880 KB Output is correct
21 Correct 230 ms 22136 KB Output is correct
22 Correct 230 ms 22136 KB Output is correct
23 Correct 246 ms 22264 KB Output is correct
24 Correct 230 ms 22128 KB Output is correct
25 Correct 112 ms 12116 KB Output is correct
26 Correct 96 ms 12156 KB Output is correct
27 Correct 242 ms 22140 KB Output is correct
28 Correct 233 ms 22136 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Runtime error 1 ms 384 KB Execution killed with signal 11
6 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Runtime error 1 ms 512 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 248 ms 22264 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 230 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 116 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 58 ms 5880 KB Output is correct
21 Correct 230 ms 22136 KB Output is correct
22 Correct 230 ms 22136 KB Output is correct
23 Correct 246 ms 22264 KB Output is correct
24 Correct 230 ms 22128 KB Output is correct
25 Correct 112 ms 12116 KB Output is correct
26 Correct 96 ms 12156 KB Output is correct
27 Correct 242 ms 22140 KB Output is correct
28 Correct 233 ms 22136 KB Output is correct
29 Correct 1 ms 256 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 0 ms 384 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Runtime error 1 ms 384 KB Execution killed with signal 11
34 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 10 ms 1280 KB Output is correct
7 Correct 248 ms 22264 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 230 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 116 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 58 ms 5880 KB Output is correct
21 Correct 230 ms 22136 KB Output is correct
22 Correct 230 ms 22136 KB Output is correct
23 Correct 246 ms 22264 KB Output is correct
24 Correct 230 ms 22128 KB Output is correct
25 Correct 112 ms 12116 KB Output is correct
26 Correct 96 ms 12156 KB Output is correct
27 Correct 242 ms 22140 KB Output is correct
28 Correct 233 ms 22136 KB Output is correct
29 Correct 1 ms 256 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 0 ms 384 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Runtime error 1 ms 384 KB Execution killed with signal 11
34 Halted 0 ms 0 KB -