oj.uz

Submission #446394

# Submission time Handle Problem Language Result Execution time Memory
446394 2021-07-21T20:32:04 Z luciocf Fountain Parks (IOI21_parks) C++17
15 / 100
 201 ms 22552 KB 
#include <bits/stdc++.h>
#include "parks.h"

using namespace std;

const int maxn = 2e5+10;

struct Pt
{
    int x, y, ind;
} a[maxn];

struct Road
{
    int u, v, x, y;
} road[maxn];

struct DSU
{
    int pai[maxn], peso[maxn];

    void init(int n)
    {
        for (int i = 1; i <= n; i++)
            pai[i] = i;
    }

    int Find(int x)
    {
        if (pai[x] == x) return x;
        return pai[x] = Find(pai[x]);
    }

    void Join(int x, int y)
    {
        if (x == y) return;

        if (peso[x] < peso[y]) swap(x, y);

        pai[y] = x, peso[x] += peso[y]; 
    }
} dsu;

bool comp(Pt a, Pt b)
{
    if (a.x == b.x) return a.y < b.y;
    return a.x < b.x;
}

bool comp2(Pt a, Pt b)
{
    if (a.y == b.y) return a.x < b.x;
    return a.y < b.y;
}

int construct_roads(vector<int> X, vector<int> Y)
{
    int n = X.size();
    bool sub = 1;

    int mx = 0;

    for (int i = 1; i <= n; i++)
    {
        a[i] = {X[i-1], Y[i-1], i};

        mx = max(mx, a[i].x);
    }

    if (mx > 6) sub = 0;

    dsu.init(n);

    if (sub)
    {
        sort(a+1, a+n+1, comp);

        int ind = 0, cc = n;

        for (int i = 1; i < n; i++)
        {
            if (a[i].x == a[i+1].x && a[i].y+2 == a[i+1].y)
            {
                dsu.Join(a[i].ind, a[i+1].ind), cc--;

                road[++ind] = {a[i].ind, a[i+1].ind, a[i].x-1, a[i].y+1};

                if (a[i].x == mx) road[ind].x = a[i].x+1, a[i].y+1;
            }
        }

        sort(a+1, a+n+1, comp2);

        for (int i = 1; i < n; i++)
        {
            if (dsu.Find(a[i].ind) != dsu.Find(a[i+1].ind) && a[i].y == a[i+1].y && a[i].x+2 == a[i+1].x)
            {
                dsu.Join(a[i].ind, a[i+1].ind), cc--;
                road[++ind] = {a[i].ind, a[i+1].ind, a[i].x+1, a[i].y+1};
            }
        }

        if (cc != 1) return 0;

        vector<int> U, V, A, B;

        for (int i = 1; i < n; i++)
        {
            U.push_back(road[i].u-1), V.push_back(road[i].v-1);
            A.push_back(road[i].x), B.push_back(road[i].y);
        }

        build(U, V, A, B);
        return 1;
    }
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:88:65: warning: right operand of comma operator has no effect [-Wunused-value]
   88 |                 if (a[i].x == mx) road[ind].x = a[i].x+1, a[i].y+1;
      |                                                           ~~~~~~^~
parks.cpp:116:1: warning: control reaches end of non-void function [-Wreturn-type]
  116 | }
      | ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 82 ms 10236 KB Output is correct
10 Correct 7 ms 1484 KB Output is correct
11 Correct 38 ms 5708 KB Output is correct
12 Correct 11 ms 1996 KB Output is correct
13 Correct 15 ms 2580 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 81 ms 10148 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 82 ms 10236 KB Output is correct
10 Correct 7 ms 1484 KB Output is correct
11 Correct 38 ms 5708 KB Output is correct
12 Correct 11 ms 1996 KB Output is correct
13 Correct 15 ms 2580 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 81 ms 10148 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 199 ms 21676 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 460 KB Output is correct
26 Correct 2 ms 460 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 74 ms 8920 KB Output is correct
29 Correct 117 ms 13136 KB Output is correct
30 Correct 171 ms 17376 KB Output is correct
31 Correct 201 ms 21696 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 2 ms 460 KB Output is correct
45 Correct 92 ms 10992 KB Output is correct
46 Correct 138 ms 15840 KB Output is correct
47 Correct 138 ms 15772 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 82 ms 10236 KB Output is correct
10 Correct 7 ms 1484 KB Output is correct
11 Correct 38 ms 5708 KB Output is correct
12 Correct 11 ms 1996 KB Output is correct
13 Correct 15 ms 2580 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 81 ms 10148 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 199 ms 21676 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 460 KB Output is correct
26 Correct 2 ms 460 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 74 ms 8920 KB Output is correct
29 Correct 117 ms 13136 KB Output is correct
30 Correct 171 ms 17376 KB Output is correct
31 Correct 201 ms 21696 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 2 ms 460 KB Output is correct
45 Correct 92 ms 10992 KB Output is correct
46 Correct 138 ms 15840 KB Output is correct
47 Correct 138 ms 15772 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 1 ms 204 KB Output is correct
50 Incorrect 0 ms 204 KB Tree @(3, 3) appears more than once: for edges on positions 1 and 3
51 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 82 ms 10236 KB Output is correct
10 Correct 7 ms 1484 KB Output is correct
11 Correct 38 ms 5708 KB Output is correct
12 Correct 11 ms 1996 KB Output is correct
13 Correct 15 ms 2580 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 81 ms 10148 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 172 ms 22552 KB Output is correct
21 Incorrect 174 ms 22292 KB Tree @(9, 5) appears more than once: for edges on positions 5 and 100000
22 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 82 ms 10236 KB Output is correct
10 Correct 7 ms 1484 KB Output is correct
11 Correct 38 ms 5708 KB Output is correct
12 Correct 11 ms 1996 KB Output is correct
13 Correct 15 ms 2580 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 81 ms 10148 KB Output is correct
17 Correct 195 ms 19992 KB Output is correct
18 Incorrect 189 ms 22172 KB Tree @(50001, 3) appears more than once: for edges on positions 25000 and 124999
19 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 82 ms 10236 KB Output is correct
10 Correct 7 ms 1484 KB Output is correct
11 Correct 38 ms 5708 KB Output is correct
12 Correct 11 ms 1996 KB Output is correct
13 Correct 15 ms 2580 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 81 ms 10148 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 199 ms 21676 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 460 KB Output is correct
26 Correct 2 ms 460 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 74 ms 8920 KB Output is correct
29 Correct 117 ms 13136 KB Output is correct
30 Correct 171 ms 17376 KB Output is correct
31 Correct 201 ms 21696 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 2 ms 460 KB Output is correct
45 Correct 92 ms 10992 KB Output is correct
46 Correct 138 ms 15840 KB Output is correct
47 Correct 138 ms 15772 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 1 ms 204 KB Output is correct
50 Incorrect 0 ms 204 KB Tree @(3, 3) appears more than once: for edges on positions 1 and 3
51 Halted 0 ms 0 KB -