oj.uz

Submission #948251

# Submission time Handle Problem Language Result Execution time Memory
948251 2024-03-18T02:17:22 Z steveonalex Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 169 ms 24144 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

struct DSU{
    int n;
    vector<int> parent, sz;

    DSU(int _n){
        n = _n;
        parent.resize(n); sz.resize(n, 1);
        for(int i = 0; i<n; ++i) parent[i] = i;
    }

    int find_set(int u){return (u == parent[u]) ? u : (parent[u] = find_set(parent[u]));}
    bool same_set(int u, int v){return find_set(u) == find_set(v);}

    bool join_set(int u, int v){
        u = find_set(u), v = find_set(v);
        if (u != v){
            if (sz[u] < sz[v]) swap(u, v);
            parent[v] = u;
            sz[u] += sz[v];
            return true;
        }
        return false;
    }
};

// void build(vector<vector<int>> p){
//     cout << "Answer: \n";
//     for(int i = 0; i<p.size(); ++i) printArr(p[i]);
// }

const int N = 1009;

vector<int> crew[N];

int construct(vector<vector<int>> p) {
    int n = p.size();
    vector<vector<int>> ans(n, vector<int>(n));

    for(int i = 0; i<n; ++i) crew[i].clear();

    DSU chode(n);
    for(int i = 0; i<n; ++i) for(int j = i+1; j<n; ++j) if (p[i][j]) chode.join_set(i, j);
    for(int i = 0; i<n; ++i) for(int j = i+1; j<n; ++j) if (p[i][j] == 0 && chode.same_set(i, j)) return 0; 

    for(int i = 0; i<n; ++i) crew[chode.find_set(i)].push_back(i);

    DSU sigma(n);
    for(int i= 0; i<n; ++i) for(int j = i+1; j<n; ++j) if (p[i][j] == 1) sigma.join_set(i, j);

    for(int i = 0; i<n; ++i) if (crew[i].size()){
        for(int j = 1; j < crew[i].size(); ++j) {
            int u = crew[i][0], v= crew[i][j];
            ans[u][v] = ans[v][u] = 1;
        }
        // vector<int> pos;
        // int idx = -1;
        // for(int j: crew[i]) if (j != sigma.find_set(j)) {
        //     int k = sigma.find_set(j);
        //     if (idx != -1 && k != idx) return 0;
        //     idx = k;
        //     answer[j][k] = answer[k][j] = 1;
        // }
        // else pos.push_back(j);

        // if (pos.size() == 1) break;
        // if (pos.size() == 2) return 0;
        // int m = pos.size();
        // for(int x: pos) if (x != idx) for(int y: crew[i]) if (x != y)
        //     if (p[x][y] != p[pos[0]][pos[1]]) return 0;
        // int deg = p[pos[0]][pos[1]];
        // if (pos.size() <= deg) return 0;
        // for(int i = 0; i<m; ++i) {
        //     int j = (i + 1) % m;
        //     answer[pos[i]][pos[j]] = answer[pos[j]][pos[i]] = 1;
        // }
        // if (deg == 3){
        //     answer[pos[0]][pos[2]] = answer[pos[2]][pos[0]] = 1;
        // }
    }

    build(ans);
    return 1;
}

 
// int main(void){
//     ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//     construct({{1, 1, 2, 2}, {1, 1, 2, 2}, {2, 2, 1, 2}, {2, 2, 2, 1}});
//     return 0;
// }

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:98:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |         for(int j = 1; j < crew[i].size(); ++j) {
      |                        ~~^~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 6 ms 1368 KB Output is correct
7 Correct 152 ms 22064 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 6 ms 1368 KB Output is correct
7 Correct 152 ms 22064 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 600 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1112 KB Output is correct
13 Correct 147 ms 22248 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 72 ms 12128 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 37 ms 5904 KB Output is correct
21 Correct 146 ms 24140 KB Output is correct
22 Correct 147 ms 23952 KB Output is correct
23 Correct 150 ms 24144 KB Output is correct
24 Correct 169 ms 24144 KB Output is correct
25 Correct 67 ms 14104 KB Output is correct
26 Correct 68 ms 14164 KB Output is correct
27 Correct 153 ms 24144 KB Output is correct
28 Correct 148 ms 24144 KB Output is correct

Subtask #3
0 / 19.0

# 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 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 Incorrect 0 ms 348 KB Too few ways to get from 0 to 1, should be 2 found 1
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 6 ms 1368 KB Output is correct
7 Correct 152 ms 22064 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 600 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1112 KB Output is correct
13 Correct 147 ms 22248 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 72 ms 12128 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 37 ms 5904 KB Output is correct
21 Correct 146 ms 24140 KB Output is correct
22 Correct 147 ms 23952 KB Output is correct
23 Correct 150 ms 24144 KB Output is correct
24 Correct 169 ms 24144 KB Output is correct
25 Correct 67 ms 14104 KB Output is correct
26 Correct 68 ms 14164 KB Output is correct
27 Correct 153 ms 24144 KB Output is correct
28 Correct 148 ms 24144 KB Output is correct
29 Correct 1 ms 344 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 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 6 ms 1368 KB Output is correct
7 Correct 152 ms 22064 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 600 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1112 KB Output is correct
13 Correct 147 ms 22248 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 72 ms 12128 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 37 ms 5904 KB Output is correct
21 Correct 146 ms 24140 KB Output is correct
22 Correct 147 ms 23952 KB Output is correct
23 Correct 150 ms 24144 KB Output is correct
24 Correct 169 ms 24144 KB Output is correct
25 Correct 67 ms 14104 KB Output is correct
26 Correct 68 ms 14164 KB Output is correct
27 Correct 153 ms 24144 KB Output is correct
28 Correct 148 ms 24144 KB Output is correct
29 Correct 1 ms 344 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 -