oj.uz

Submission #976110

# Submission time Handle Problem Language Result Execution time Memory
976110 2024-05-06T07:50:26 Z efedmrlr Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 211 ms 22352 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);
            }
        }
    }
    for(int i = 0; i < n; i++) {
        if(ds.sz[ds.find_set(i)] == 1) {
            ds.typ[i] = 2;
        }
    }
    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;
            if(p[i][j] != 2) 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 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 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 211 ms 21992 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 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 211 ms 21992 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 9 ms 1116 KB Output is correct
13 Correct 153 ms 22024 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 73 ms 12040 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 39 ms 5712 KB Output is correct
21 Correct 151 ms 22024 KB Output is correct
22 Correct 173 ms 22196 KB Output is correct
23 Correct 205 ms 22024 KB Output is correct
24 Correct 163 ms 22100 KB Output is correct
25 Correct 67 ms 12116 KB Output is correct
26 Correct 66 ms 12060 KB Output is correct
27 Correct 160 ms 22096 KB Output is correct
28 Correct 153 ms 22028 KB Output is correct

Subtask #3
0 / 19.0

# 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 344 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 0 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 45 ms 5716 KB Output is correct
5 Correct 164 ms 22076 KB Output is correct
6 Correct 175 ms 22164 KB Output is correct
7 Correct 153 ms 22096 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 38 ms 5716 KB Output is correct
10 Correct 154 ms 22032 KB Output is correct
11 Correct 150 ms 22040 KB Output is correct
12 Correct 162 ms 22352 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Incorrect 39 ms 6236 KB Too few ways to get from 0 to 24, should be 2 found 0
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 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 211 ms 21992 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 9 ms 1116 KB Output is correct
13 Correct 153 ms 22024 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 73 ms 12040 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 39 ms 5712 KB Output is correct
21 Correct 151 ms 22024 KB Output is correct
22 Correct 173 ms 22196 KB Output is correct
23 Correct 205 ms 22024 KB Output is correct
24 Correct 163 ms 22100 KB Output is correct
25 Correct 67 ms 12116 KB Output is correct
26 Correct 66 ms 12060 KB Output is correct
27 Correct 160 ms 22096 KB Output is correct
28 Correct 153 ms 22028 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 344 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 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 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 211 ms 21992 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 9 ms 1116 KB Output is correct
13 Correct 153 ms 22024 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 73 ms 12040 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 39 ms 5712 KB Output is correct
21 Correct 151 ms 22024 KB Output is correct
22 Correct 173 ms 22196 KB Output is correct
23 Correct 205 ms 22024 KB Output is correct
24 Correct 163 ms 22100 KB Output is correct
25 Correct 67 ms 12116 KB Output is correct
26 Correct 66 ms 12060 KB Output is correct
27 Correct 160 ms 22096 KB Output is correct
28 Correct 153 ms 22028 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -