oj.uz

Submission #1051920

# Submission time Handle Problem Language Result Execution time Memory
1051920 2024-08-10T10:36:20 Z amine_aroua Fountain Parks (IOI21_parks) C++17
15 / 100
 327 ms 39048 KB 
#include "parks.h"
#include<bits/stdc++.h>
using namespace std;
struct DSU 
{
    vector<int> e;
    DSU(int n)
    {
        e.assign(n , -1);
    }
    int get(int u )
    {
        return (e[u] < 0 ? u : e[u] = get(e[u]));
    }
    bool same(int u , int v)
    {
        return get(u) == get(v);
    }
    bool unite(int u , int v)
    {
        u = get(u ) , v =get(v);
        if(u == v)
            return 0;
        if(e[u] > e[v])
            swap(u , v);
        e[u]+=e[v];
        e[v] = u;
        return 1;
    }
};
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int construct_roads(std::vector<int> x, std::vector<int> y) {
    int n= (int)x.size();
    vector<int> u , v , a , b;
    map<pair<int, int> , int> idx;
    set<pair<int ,int>> taken;
    for(int i = 0 ; i <n ; i++)
    {
        idx[{x[i] , y[i]}] = i;
    }
    vector<pair<int ,int>> vv;
    for(int i = 0 ; i < n ; i++)
        vv.push_back({x[i] , y[i]});
    sort(vv.begin() , vv.end() , [](pair<int, int> a , pair<int ,int> b){return a.first + a.second < b.first + b.second;});
    u.clear();
    v.clear();
    a.clear();
    b.clear();
    taken.clear();
    for(int i = 0 ; i < n ;i++)
    {
        x[i] = vv[i].first , y[i] = vv[i].second;
    }
    DSU dsu(n);
    for(int i = 0 ; i < n ;i++)
    {
        if(idx.count({x[i] + 2 , y[i]}) && dsu.unite(idx[{x[i] , y[i]}] , idx[{x[i] + 2 , y[i]}]))
        {
            if(!taken.count({x[i] + 1 , y[i] - 1}))
            {
                u.push_back(idx[{x[i] , y[i]}]);
                v.push_back(idx[{x[i] + 2 , y[i]}]);
                a.push_back(x[i] + 1);
                b.push_back(y[i] - 1);
                taken.insert({x[i] + 1 , y[i] - 1});
            }
            else if(!taken.count({x[i] + 1 , y[i] + 1}))
            {
                u.push_back(idx[{x[i] , y[i]}]);
                v.push_back(idx[{x[i] + 2 , y[i]}]);
                a.push_back(x[i] + 1);
                b.push_back(y[i] + 1);
                taken.insert({x[i] + 1 , y[i] + 1});
            }
        }
        if(idx.count({x[i] , y[i] + 2}) && dsu.unite(idx[{x[i] , y[i]}] , idx[{x[i] , y[i] + 2}]))
        {
            
            if(!taken.count({x[i] - 1 , y[i] + 1}))
            {
                u.push_back(idx[{x[i] , y[i]}]);
                v.push_back(idx[{x[i] , y[i] + 2}]);
                b.push_back(y[i] + 1);
                a.push_back(x[i] - 1);
                taken.insert({x[i] - 1 , y[i] +1});
            }
            else if(!taken.count({x[i] + 1 , y[i] + 1}))
            {
                u.push_back(idx[{x[i] , y[i]}]);
                v.push_back(idx[{x[i] , y[i] + 2}]);
                b.push_back(y[i] + 1);
                a.push_back(x[i] + 1);
                taken.insert({x[i] + 1 , y[i] +1});
            }
        }
    }
    set<int> s;
    for(int i = 0 ;i < n ;i++)
    {
        s.insert(dsu.get(i));
    }
    if((int)s.size() == 1)
    {
        build(u , v , a , b);
        return 1;
    }
    
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 105 ms 19256 KB Output is correct
10 Correct 8 ms 2396 KB Output is correct
11 Correct 63 ms 10492 KB Output is correct
12 Correct 14 ms 3396 KB Output is correct
13 Correct 36 ms 7124 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 121 ms 19216 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 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 105 ms 19256 KB Output is correct
10 Correct 8 ms 2396 KB Output is correct
11 Correct 63 ms 10492 KB Output is correct
12 Correct 14 ms 3396 KB Output is correct
13 Correct 36 ms 7124 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 121 ms 19216 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 280 ms 38472 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 860 KB Output is correct
27 Correct 3 ms 856 KB Output is correct
28 Correct 114 ms 15688 KB Output is correct
29 Correct 157 ms 23168 KB Output is correct
30 Correct 204 ms 31032 KB Output is correct
31 Correct 311 ms 38536 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 2 ms 604 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Correct 127 ms 19396 KB Output is correct
46 Correct 173 ms 28592 KB Output is correct
47 Correct 168 ms 28644 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 105 ms 19256 KB Output is correct
10 Correct 8 ms 2396 KB Output is correct
11 Correct 63 ms 10492 KB Output is correct
12 Correct 14 ms 3396 KB Output is correct
13 Correct 36 ms 7124 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 121 ms 19216 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 280 ms 38472 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 860 KB Output is correct
27 Correct 3 ms 856 KB Output is correct
28 Correct 114 ms 15688 KB Output is correct
29 Correct 157 ms 23168 KB Output is correct
30 Correct 204 ms 31032 KB Output is correct
31 Correct 311 ms 38536 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 2 ms 604 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Correct 127 ms 19396 KB Output is correct
46 Correct 173 ms 28592 KB Output is correct
47 Correct 168 ms 28644 KB Output is correct
48 Correct 0 ms 600 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 277 ms 38376 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 2 ms 600 KB Output is correct
58 Correct 7 ms 1628 KB Output is correct
59 Correct 10 ms 1932 KB Output is correct
60 Correct 139 ms 19220 KB Output is correct
61 Correct 173 ms 27012 KB Output is correct
62 Correct 223 ms 31932 KB Output is correct
63 Correct 299 ms 38664 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 249 ms 38520 KB Output is correct
68 Correct 243 ms 38528 KB Output is correct
69 Correct 237 ms 38420 KB Output is correct
70 Correct 3 ms 860 KB Output is correct
71 Correct 7 ms 1628 KB Output is correct
72 Incorrect 106 ms 19112 KB Given structure is not connected: There is no path between vertices 0 and 1
73 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 105 ms 19256 KB Output is correct
10 Correct 8 ms 2396 KB Output is correct
11 Correct 63 ms 10492 KB Output is correct
12 Correct 14 ms 3396 KB Output is correct
13 Correct 36 ms 7124 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 121 ms 19216 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Incorrect 327 ms 35600 KB Given structure is not connected: There is no path between vertices 0 and 1
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 105 ms 19256 KB Output is correct
10 Correct 8 ms 2396 KB Output is correct
11 Correct 63 ms 10492 KB Output is correct
12 Correct 14 ms 3396 KB Output is correct
13 Correct 36 ms 7124 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 121 ms 19216 KB Output is correct
17 Correct 242 ms 38784 KB Output is correct
18 Correct 258 ms 39048 KB Output is correct
19 Incorrect 291 ms 37248 KB Given structure is not connected: There is no path between vertices 0 and 1
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 105 ms 19256 KB Output is correct
10 Correct 8 ms 2396 KB Output is correct
11 Correct 63 ms 10492 KB Output is correct
12 Correct 14 ms 3396 KB Output is correct
13 Correct 36 ms 7124 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 121 ms 19216 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 280 ms 38472 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 860 KB Output is correct
27 Correct 3 ms 856 KB Output is correct
28 Correct 114 ms 15688 KB Output is correct
29 Correct 157 ms 23168 KB Output is correct
30 Correct 204 ms 31032 KB Output is correct
31 Correct 311 ms 38536 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 2 ms 604 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Correct 127 ms 19396 KB Output is correct
46 Correct 173 ms 28592 KB Output is correct
47 Correct 168 ms 28644 KB Output is correct
48 Correct 0 ms 600 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 277 ms 38376 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 2 ms 600 KB Output is correct
58 Correct 7 ms 1628 KB Output is correct
59 Correct 10 ms 1932 KB Output is correct
60 Correct 139 ms 19220 KB Output is correct
61 Correct 173 ms 27012 KB Output is correct
62 Correct 223 ms 31932 KB Output is correct
63 Correct 299 ms 38664 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 249 ms 38520 KB Output is correct
68 Correct 243 ms 38528 KB Output is correct
69 Correct 237 ms 38420 KB Output is correct
70 Correct 3 ms 860 KB Output is correct
71 Correct 7 ms 1628 KB Output is correct
72 Incorrect 106 ms 19112 KB Given structure is not connected: There is no path between vertices 0 and 1
73 Halted 0 ms 0 KB -