oj.uz

Submission #1073161

# Submission time Handle Problem Language Result Execution time Memory
1073161 2024-08-24T09:55:47 Z TheQuantiX Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 159 ms 24180 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
 
using namespace std;
using ll = long long;
 
ll n, m, q, k, x, y, a, b, c;
 
struct dsu {
    ll n;
    vector<ll> par;
    vector<ll> sz;
 
    dsu(ll N) : n(N) {
        par.resize(n);
        sz.resize(n);
        for (int i = 0; i < n; i++) {
            par[i] = i;
            sz[i] = 1;
        }
    }
 
    ll find_p(ll x) {
        if (par[x] == x) {
            return x;
        }
        ll p = find_p(par[x]);
        par[x] = p;
        return p;
    }
 
    void join(ll x, ll y) {
        x = find_p(x);
        y = find_p(y);
        if (x == y) {
            return;
        }
        if (sz[y] > sz[x]) {
            swap(x, y);
        }
        par[y] = x;
        sz[x] += sz[y];
    }
};
 
int construct(vector< vector<int> > p) {
    n = p.size();
    vector< vector<int> > ans(n, vector<int>(n));
    vector< vector<ll> > comp(n);
    vector< vector<ll> > comp2(n);
    dsu d(n);
    bitset<1000> bt;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            if (p[i][j] == 1) {
                d.join(i, j);
                bt.set(i);
                bt.set(j);
            }
        }
    }
    for (int i = 0; i < n; i++) {
        if (!bt[i]) {
            continue;
        }
        comp[d.find_p(i)].push_back(i);
    }
    for (auto i : comp) {
        for (int j : i) {
            for (int k : i) {
                if (p[j][k] != 1) {
                    return 0;
                }
            }
        }
    }
    for (auto i : comp) {
        if (i.size() <= 1) {
            continue;
        }
        for (int j = 0; j < i.size() - 1; j++) {
            ans[i[(j + 1) % i.size()]][i[j]] = 1;
            ans[i[j]][i[(j + 1) % i.size()]] = 1;
        }
    }
    for (int i = 0; i < n; i++) {
        set<ll> st2;
        for (int j : comp[i]) {
            for (int k = 0; k < n; k++) {
                if (p[j][k] == 2) {
                    // if (bt[k]) {
                    //     return 0;
                    // }
                    st2.insert(k);
                }
            }
        }
        // cout << i << ' ' << st2.size() << '\n';
        for (int j : st2) {
            comp2[i].push_back(j);
            bt.set(j);
        }
    }
    // for (auto i : comp2) {
    //     if (i.size() == 1) {
    //         return 0;
    //     }
    //     for (int j : i) {
    //         for (int k : i) {
    //             if (j != k && p[j][k] != 2) {
    //                 return 0;
    //             }
    //         }
    //     }
    // }
    // for (auto i = 0; i < n; i++) {
    //     for (int j : comp[i]) {
    //         for (int k : comp2[i]) {
    //             if (p[j][k] != 2) {
    //                 return 0;
    //             }
    //         }
    //     }
    // }
    // cout << "DEBUG" << endl;
    for (auto i = 0; i < n; i++) {
        if (comp2[i].size() == 0) {
            continue;
        }
        comp2[i].push_back(i);
        for (int j = 0; j < comp2[i].size(); j++) {
            ans[comp2[i][(j + 1) % comp2[i].size()]][comp2[i][j]] = 1;
            ans[comp2[i][j]][comp2[i][(j + 1) % comp2[i].size()]] = 1;
        }
    }
    vector< vector<ll> > comp2i(n);
    dsu d2(n);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            // if (bt[i] && !bt[j] && p[i][j] != 0) {
            //     return 0;
            // }
            // if (!bt[i] && bt[j] && p[i][j] != 0) {
            //     return 0;
            // }
            if (!bt[i] && !bt[j] && p[i][j] == 2) {
                d2.join(i, j);
            }
        }
    }
    for (int i = 0; i < n; i++) {
        comp2i[d2.find_p(i)].push_back(i);
    }
    // for (auto i : comp2i) {
    //     if (i.size() == 2) {
    //         return 0;
    //     }
    //     for (int j : i) {
    //         for (int k : i) {
    //             if (p[j][k] == 0) {
    //                 return 0;
    //             }
    //         }
    //     }
    // }
    for (auto i : comp2i) {
        if (i.size() <= 1) {
            continue;
        }
        for (int j = 0; j < i.size(); j++) {
            ans[i[(j + 1) % i.size()]][i[j]] = 1;
            ans[i[j]][i[(j + 1) % i.size()]] = 1;
        }
    }
    build(ans);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:81:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |         for (int j = 0; j < i.size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~
supertrees.cpp:131:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |         for (int j = 0; j < comp2[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~~~
supertrees.cpp:170:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |         for (int j = 0; j < i.size(); j++) {
      |                         ~~^~~~~~~~~~

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 348 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 9 ms 1116 KB Output is correct
7 Correct 159 ms 22096 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 348 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 9 ms 1116 KB Output is correct
7 Correct 159 ms 22096 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 0 ms 504 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 117 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 4 ms 960 KB Output is correct
17 Correct 69 ms 14336 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 59 ms 6224 KB Output is correct
21 Correct 143 ms 24160 KB Output is correct
22 Correct 143 ms 24148 KB Output is correct
23 Correct 124 ms 24148 KB Output is correct
24 Correct 119 ms 24148 KB Output is correct
25 Correct 56 ms 14204 KB Output is correct
26 Correct 53 ms 14256 KB Output is correct
27 Correct 148 ms 24180 KB Output is correct
28 Correct 135 ms 24148 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 1 ms 344 KB Output is correct
4 Incorrect 1 ms 344 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 31 ms 5812 KB Output is correct
5 Correct 150 ms 22104 KB Output is correct
6 Correct 120 ms 22096 KB Output is correct
7 Correct 150 ms 22096 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 27 ms 5880 KB Output is correct
10 Correct 112 ms 22100 KB Output is correct
11 Correct 122 ms 22096 KB Output is correct
12 Correct 118 ms 22288 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Incorrect 28 ms 5928 KB Too many ways to get from 0 to 463, should be 2 found no less than 3
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 348 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 9 ms 1116 KB Output is correct
7 Correct 159 ms 22096 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 0 ms 504 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 117 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 4 ms 960 KB Output is correct
17 Correct 69 ms 14336 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 59 ms 6224 KB Output is correct
21 Correct 143 ms 24160 KB Output is correct
22 Correct 143 ms 24148 KB Output is correct
23 Correct 124 ms 24148 KB Output is correct
24 Correct 119 ms 24148 KB Output is correct
25 Correct 56 ms 14204 KB Output is correct
26 Correct 53 ms 14256 KB Output is correct
27 Correct 148 ms 24180 KB Output is correct
28 Correct 135 ms 24148 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Incorrect 1 ms 344 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 348 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 9 ms 1116 KB Output is correct
7 Correct 159 ms 22096 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 0 ms 504 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 117 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 4 ms 960 KB Output is correct
17 Correct 69 ms 14336 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 59 ms 6224 KB Output is correct
21 Correct 143 ms 24160 KB Output is correct
22 Correct 143 ms 24148 KB Output is correct
23 Correct 124 ms 24148 KB Output is correct
24 Correct 119 ms 24148 KB Output is correct
25 Correct 56 ms 14204 KB Output is correct
26 Correct 53 ms 14256 KB Output is correct
27 Correct 148 ms 24180 KB Output is correct
28 Correct 135 ms 24148 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Incorrect 1 ms 344 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -