oj.uz

Submission #976101

# Submission time Handle Problem Language Result Execution time Memory
976101 2024-05-06T07:46:33 Z efedmrlr Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 196 ms 22276 KB 
// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,popcnt")
#include <bits/stdc++.h>
#include "supertrees.h"


#define lli long long int
#define ld long double
#define REP(i, n) for(int i = 0; (i) < (n); (i)++)
#define all(x) x.begin(), x.end();
#define rall(x) x.rbegin(), x.rend()
#define pb push_back
#define MP make_pair

using namespace std;

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}

const int N = 1e5 + 5;
const int INF = 1e9 + 500;
const int MOD = 1e9 + 7;

struct DSU {
    vector<int> p, sz, typ;
    int n;
    void make_set(int x) {
        p[x] = x;
        sz[x] = 1;
    }
    void init(int nn) {
        n = nn;
        p.assign(n + 3, 0);
        sz.assign(n + 3, 0);
        typ.assign(n + 3, 0);
        for(int i = 0; i < n; i++) {
            make_set(i);
        }
    }
    int find_set(int x) {
        return (x == p[x]) ? x : p[x] = find_set(p[x]);
    }
    bool union_set(int x, int y) {
        x = find_set(x); y = find_set(y);
        if(x == y) return 0;
        if(sz[x] < sz[y]) swap(x, y);
        sz[x] += sz[y];
        p[y] = x;
        return 1;
    }
};

int construct(std::vector<std::vector<int>> p) {
	int n = (int)p.size();
	vector<vector<int> > ans(n, vector<int>(n, 0));
    DSU ds, ds2;
    ds.init(n);

    // check zero
    bool f = 1;
    for(int i = 0; i < n; i++) {
        for(int j = i + 1; j < n; j++) {
            if(p[i][j]) {
                ds.union_set(i, j);
            }
        }
    }
    for(int i = 0; i < n; i++) {
        for(int j = i + 1; j < n; j++) {
            if(!p[i][j] && ds.find_set(i) == ds.find_set(j)) {
                f = 0;
            }
        }
    }
    if(!f) return 0;
    // cerr << "zort" << endl;
    ds.init(n);
    
    for(int i = 0; i < n; i++) {
        for(int j = i + 1; j < n; j++) {
            if(p[i][j] == 1) {
                ds.union_set(i, j);
            }
        }
    }
    for(int i = 0; i < n; i++) {
        if(ds.sz[ds.find_set(i)] > 1) {
            ds.typ[i] = 1; 
        }
    }
    for(int i = 0; i < n; i++) {
        for(int j = i + 1; j < n; j++) {
            if(p[i][j] == 2 && !ds.typ[i] && !ds.typ[j]) {
                ds.union_set(i, j);
            }
        }
    }
    vector<vector<int> > comp(n, vector<int>());
    for(int i = 0; i < n; i++) {
        comp[ds.find_set(i)].pb(i);
    }
    
    for(int i = 0; i < n; i++) {
        for(int j = i + 1; j < n; j++) {
            if(ds.find_set(i) != i || ds.find_set(j) != j) continue;
            if(ds.sz[i] < 2 || ds.sz[j] < 2) continue;
            if(ds.typ[i] == ds.typ[j]) continue;
            int x = i, y = j;
            if(ds.typ[x]) swap(x, y);
            comp[x].pb(y); 
        } 
    }
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < (int)comp[i].size() - 1; j++) {
            ans[comp[i][j]][comp[i][j + 1]] = 1;
            ans[comp[i][j + 1]][comp[i][j]] = 1;
        }
        if((int)comp[i].size() > 1 && !ds.typ[i]) {
            ans[comp[i].back()][comp[i][0]] = 1;
            ans[comp[i][0]][comp[i].back()] = 1;
        }
    }
    if(!f) return 0;
    build(ans);

	return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 155 ms 22276 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 155 ms 22276 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 145 ms 22224 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 75 ms 12056 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 42 ms 5800 KB Output is correct
21 Correct 169 ms 22016 KB Output is correct
22 Correct 196 ms 22028 KB Output is correct
23 Correct 156 ms 22036 KB Output is correct
24 Correct 147 ms 22100 KB Output is correct
25 Correct 79 ms 12036 KB Output is correct
26 Correct 69 ms 12048 KB Output is correct
27 Correct 164 ms 22016 KB Output is correct
28 Correct 169 ms 22220 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 37 ms 5920 KB Output is correct
5 Correct 153 ms 22100 KB Output is correct
6 Correct 148 ms 22100 KB Output is correct
7 Correct 155 ms 22036 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 37 ms 5868 KB Output is correct
10 Correct 151 ms 22096 KB Output is correct
11 Correct 147 ms 22100 KB Output is correct
12 Correct 163 ms 22040 KB Output is correct
13 Correct 0 ms 360 KB Output is correct
14 Incorrect 0 ms 344 KB Too many ways to get from 0 to 4, should be 0 found no less than 1
15 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 155 ms 22276 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 145 ms 22224 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 75 ms 12056 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 42 ms 5800 KB Output is correct
21 Correct 169 ms 22016 KB Output is correct
22 Correct 196 ms 22028 KB Output is correct
23 Correct 156 ms 22036 KB Output is correct
24 Correct 147 ms 22100 KB Output is correct
25 Correct 79 ms 12036 KB Output is correct
26 Correct 69 ms 12048 KB Output is correct
27 Correct 164 ms 22016 KB Output is correct
28 Correct 169 ms 22220 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 155 ms 22276 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 145 ms 22224 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 75 ms 12056 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 42 ms 5800 KB Output is correct
21 Correct 169 ms 22016 KB Output is correct
22 Correct 196 ms 22028 KB Output is correct
23 Correct 156 ms 22036 KB Output is correct
24 Correct 147 ms 22100 KB Output is correct
25 Correct 79 ms 12036 KB Output is correct
26 Correct 69 ms 12048 KB Output is correct
27 Correct 164 ms 22016 KB Output is correct
28 Correct 169 ms 22220 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -