oj.uz

Submission #970326

# Submission time Handle Problem Language Result Execution time Memory
970326 2024-04-26T11:08:46 Z mychecksedad Fountain Parks (IOI21_parks) C++17
30 / 100
 873 ms 60760 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n';
#define ll long long int
const int N = 3e5+10;

struct Dsu{
    vector<int> s, p;
    Dsu(int n){
        s.resize(n, 1);
        p.resize(n);
        for(int i = 0; i < n; ++i) p[i] = i;
    }
    int find(int v){
        if(p[v] == v) return v;
        return p[v] = find(p[v]);
    }
    void merge(int a, int b){
        a = find(a);
        b = find(b);
        if(a != b){
            if(s[a] > s[b]) swap(a, b);
            p[a] = b;
            s[b] += s[a];
        }
    }
};
int A[4][2] = {{2, 0}, {0, 2}, {-2, 0}, {0, -2}};
        

int construct_roads(std::vector<int> x, std::vector<int> y) {
    if (x.size() == 1) {
    build({}, {}, {}, {});
        return 1;
    }
    int n = x.size();
    vector<int> u, v, a, b;

    Dsu d(n);
    bool other = 0;
    vector<pair<int, int>> L, R, M;
    for(int i = 0; i < n; ++i){
        if(x[i] == 2) L.pb({y[i], i}); 
        else if(x[i] == 6) R.pb({y[i], i});
        else if(x[i] == 4) M.pb({y[i], i});
        else{
            other = 1;
        }
    }
    if(other){
        map<pair<int, int>, int> m;
        map<pair<int, int>, bool> used;
        for(int i = 0; i < n; ++i) m[{x[i], y[i]}] = i + 1;
        for(int i = 0; i < n; ++i){
            for(int j = 0; j < 4; ++j){
                int nx = A[j][0] + x[i], ny = A[j][1] + y[i];
                int val = m[{nx, ny}];
                if(val != 0 && d.find(val - 1) != d.find(i)){
                    d.merge(val - 1, i);
                    u.pb(i);
                    v.pb(val - 1);
                    int fx = A[j][0] == 0 ? x[i] + 1 : x[i] + A[j][0] / 2;
                    int fy = A[j][1] == 0 ? y[i] + 1 : y[i] + A[j][1] / 2;
                    if(used[{fx, fy}]){
                        if(A[j][0] == 0) fx = x[i] - 1;
                        else fy = y[i] - 1;
                    }
                    a.pb(fx);
                    b.pb(fy);
                    used[{fx, fy}] = 1;
                }
            }
        }
    }else{
        sort(all(L));
        sort(all(R));
        sort(all(M));
        for(int i = 0; i + 1 < L.size(); ++i){
            if(L[i].first < L[i + 1].first - 2) continue;
            u.pb(L[i].second);
            v.pb(L[i + 1].second);
            a.pb(1);
            b.pb(L[i + 1].first + L[i].first>>1);
            d.merge(L[i].second, L[i + 1].second);
        }
        for(int i = 0; i + 1 < R.size(); ++i){
            if(R[i].first < R[i + 1].first - 2) continue;
            u.pb(R[i].second);
            v.pb(R[i + 1].second);
            a.pb(7);
            b.pb(R[i + 1].first + R[i].first>>1);
            d.merge(R[i].second, R[i + 1].second);
        }
        for(int i = 0; i + 1 < M.size(); ++i){
            if(M[i].first < M[i + 1].first - 2) continue;
            u.pb(M[i].second);
            v.pb(M[i + 1].second);
            a.pb((M[i].first/2)%2 == 0 ? 5 : 3);
            b.pb(M[i + 1].first + M[i].first>>1);
            d.merge(M[i].second, M[i + 1].second);
        }

        int p = 0, last = -5;
        for(int i = 0; i < M.size(); ++i){
            while(p < R.size() && R[p].first < M[i].first) ++p;
            if(p < R.size() && R[p].first == M[i].first){
                if(last + 2 == M[i].first) continue;
                last = M[i].first;
                u.pb(R[p].second);
                v.pb(M[i].second);
                a.pb(5);
                b.pb(M[i].first + ((M[i].first/2) % 2 == 0 ? -1 : 1));
                d.merge(R[p].second, M[i].second);
            }
        }
        p = 0, last = -5;
        for(int i = 0; i < M.size(); ++i){
            while(p < L.size() && L[p].first < M[i].first) ++p;
            if(p < L.size() && L[p].first == M[i].first){
                if(last + 2 == M[i].first) continue;
                last = M[i].first;
                u.pb(L[p].second);
                v.pb(M[i].second);
                a.pb(3);
                b.pb(M[i].first + ((M[i].first/2) % 2 == 0 ? 1 : -1));
                d.merge(L[p].second, M[i].second);
            }
        }
    }

    if(d.s[d.find(0)] < n) return 0;
    build(u, v, a, b);
    return 1;
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:81:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |         for(int i = 0; i + 1 < L.size(); ++i){
      |                        ~~~~~~^~~~~~~~~~
parks.cpp:86:33: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   86 |             b.pb(L[i + 1].first + L[i].first>>1);
parks.cpp:89:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |         for(int i = 0; i + 1 < R.size(); ++i){
      |                        ~~~~~~^~~~~~~~~~
parks.cpp:94:33: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   94 |             b.pb(R[i + 1].first + R[i].first>>1);
parks.cpp:97:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |         for(int i = 0; i + 1 < M.size(); ++i){
      |                        ~~~~~~^~~~~~~~~~
parks.cpp:102:33: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  102 |             b.pb(M[i + 1].first + M[i].first>>1);
parks.cpp:107:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |         for(int i = 0; i < M.size(); ++i){
      |                        ~~^~~~~~~~~~
parks.cpp:108:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |             while(p < R.size() && R[p].first < M[i].first) ++p;
      |                   ~~^~~~~~~~~~
parks.cpp:109:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |             if(p < R.size() && R[p].first == M[i].first){
      |                ~~^~~~~~~~~~
parks.cpp:120:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |         for(int i = 0; i < M.size(); ++i){
      |                        ~~^~~~~~~~~~
parks.cpp:121:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  121 |             while(p < L.size() && L[p].first < M[i].first) ++p;
      |                   ~~^~~~~~~~~~
parks.cpp:122:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  122 |             if(p < L.size() && L[p].first == M[i].first){
      |                ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# 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 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 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 54 ms 8392 KB Output is correct
10 Correct 6 ms 1292 KB Output is correct
11 Correct 22 ms 4820 KB Output is correct
12 Correct 6 ms 1764 KB Output is correct
13 Correct 8 ms 2964 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 49 ms 8576 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 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 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 54 ms 8392 KB Output is correct
10 Correct 6 ms 1292 KB Output is correct
11 Correct 22 ms 4820 KB Output is correct
12 Correct 6 ms 1764 KB Output is correct
13 Correct 8 ms 2964 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 49 ms 8576 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 113 ms 18664 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 47 ms 7932 KB Output is correct
29 Correct 66 ms 11336 KB Output is correct
30 Correct 88 ms 15424 KB Output is correct
31 Correct 117 ms 18488 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 1 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 344 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 49 ms 8456 KB Output is correct
46 Correct 74 ms 12760 KB Output is correct
47 Correct 71 ms 12608 KB Output is correct

Subtask #3
15.0 / 15.0

# 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 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 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 54 ms 8392 KB Output is correct
10 Correct 6 ms 1292 KB Output is correct
11 Correct 22 ms 4820 KB Output is correct
12 Correct 6 ms 1764 KB Output is correct
13 Correct 8 ms 2964 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 49 ms 8576 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 113 ms 18664 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 47 ms 7932 KB Output is correct
29 Correct 66 ms 11336 KB Output is correct
30 Correct 88 ms 15424 KB Output is correct
31 Correct 117 ms 18488 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 1 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 344 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 49 ms 8456 KB Output is correct
46 Correct 74 ms 12760 KB Output is correct
47 Correct 71 ms 12608 KB Output is correct
48 Correct 0 ms 344 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 151 ms 19380 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 604 KB Output is correct
58 Correct 3 ms 1116 KB Output is correct
59 Correct 2 ms 860 KB Output is correct
60 Correct 56 ms 9992 KB Output is correct
61 Correct 76 ms 13240 KB Output is correct
62 Correct 95 ms 16048 KB Output is correct
63 Correct 118 ms 19244 KB Output is correct
64 Correct 0 ms 344 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 1 ms 348 KB Output is correct
67 Correct 99 ms 16520 KB Output is correct
68 Correct 99 ms 16724 KB Output is correct
69 Correct 98 ms 16448 KB Output is correct
70 Correct 1 ms 604 KB Output is correct
71 Correct 2 ms 860 KB Output is correct
72 Correct 47 ms 8644 KB Output is correct
73 Correct 74 ms 12316 KB Output is correct
74 Correct 99 ms 16704 KB Output is correct
75 Correct 110 ms 18112 KB Output is correct
76 Correct 97 ms 16544 KB Output is correct
77 Correct 1 ms 600 KB Output is correct
78 Correct 2 ms 860 KB Output is correct
79 Correct 50 ms 9044 KB Output is correct
80 Correct 78 ms 12916 KB Output is correct
81 Correct 104 ms 17464 KB Output is correct

Subtask #4
0 / 20.0

# 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 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 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 54 ms 8392 KB Output is correct
10 Correct 6 ms 1292 KB Output is correct
11 Correct 22 ms 4820 KB Output is correct
12 Correct 6 ms 1764 KB Output is correct
13 Correct 8 ms 2964 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 49 ms 8576 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Incorrect 697 ms 46708 KB Tree @(175837, 24165) appears more than once: for edges on positions 5504 and 5505
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 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 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 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 54 ms 8392 KB Output is correct
10 Correct 6 ms 1292 KB Output is correct
11 Correct 22 ms 4820 KB Output is correct
12 Correct 6 ms 1764 KB Output is correct
13 Correct 8 ms 2964 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 49 ms 8576 KB Output is correct
17 Correct 848 ms 58852 KB Output is correct
18 Correct 873 ms 60760 KB Output is correct
19 Incorrect 704 ms 47320 KB Tree @(43595, 6409) appears more than once: for edges on positions 7880 and 7881
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# 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 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 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 54 ms 8392 KB Output is correct
10 Correct 6 ms 1292 KB Output is correct
11 Correct 22 ms 4820 KB Output is correct
12 Correct 6 ms 1764 KB Output is correct
13 Correct 8 ms 2964 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 49 ms 8576 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 113 ms 18664 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 47 ms 7932 KB Output is correct
29 Correct 66 ms 11336 KB Output is correct
30 Correct 88 ms 15424 KB Output is correct
31 Correct 117 ms 18488 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 1 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 344 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 49 ms 8456 KB Output is correct
46 Correct 74 ms 12760 KB Output is correct
47 Correct 71 ms 12608 KB Output is correct
48 Correct 0 ms 344 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 151 ms 19380 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 604 KB Output is correct
58 Correct 3 ms 1116 KB Output is correct
59 Correct 2 ms 860 KB Output is correct
60 Correct 56 ms 9992 KB Output is correct
61 Correct 76 ms 13240 KB Output is correct
62 Correct 95 ms 16048 KB Output is correct
63 Correct 118 ms 19244 KB Output is correct
64 Correct 0 ms 344 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 1 ms 348 KB Output is correct
67 Correct 99 ms 16520 KB Output is correct
68 Correct 99 ms 16724 KB Output is correct
69 Correct 98 ms 16448 KB Output is correct
70 Correct 1 ms 604 KB Output is correct
71 Correct 2 ms 860 KB Output is correct
72 Correct 47 ms 8644 KB Output is correct
73 Correct 74 ms 12316 KB Output is correct
74 Correct 99 ms 16704 KB Output is correct
75 Correct 110 ms 18112 KB Output is correct
76 Correct 97 ms 16544 KB Output is correct
77 Correct 1 ms 600 KB Output is correct
78 Correct 2 ms 860 KB Output is correct
79 Correct 50 ms 9044 KB Output is correct
80 Correct 78 ms 12916 KB Output is correct
81 Correct 104 ms 17464 KB Output is correct
82 Correct 0 ms 344 KB Output is correct
83 Correct 1 ms 348 KB Output is correct
84 Correct 0 ms 344 KB Output is correct
85 Incorrect 697 ms 46708 KB Tree @(175837, 24165) appears more than once: for edges on positions 5504 and 5505
86 Halted 0 ms 0 KB -