oj.uz

Submission #492439

# Submission time Handle Problem Language Result Execution time Memory
492439 2021-12-07T10:33:22 Z dxz05 Fountain Parks (IOI21_parks) C++17
15 / 100
 403 ms 37988 KB 
#include "parks.h"
#include <bits/stdc++.h>

using namespace std;

const int N = 2e5 + 3e2;

#define all(x) (x).begin(), (x).end()

int p[N];

int find(int x){
    return (x == p[x] ? x : p[x] = find(p[x]));
}

bool unite(int x, int y){
    x = find(x);
    y = find(y);
    if (x == y) return false;
    if (rand() & 1) swap(x, y);
    p[x] = y;
    return true;
}

int construct_roads(vector<int> x, vector<int> y) {
    int n = x.size();
    if (n == 1) {
        build({}, {}, {}, {});
        return 1;
    }

    vector<int> perm(n);
    iota(all(perm), 0);
    sort(all(perm), [&](int i, int j){
        return x[i] < x[j] || x[i] == x[j] && y[i] < y[j];
    });

    iota(p, p + n, 0);

    map<pair<int, int>, int> id;
    for (int i = 0; i < n; i++){
        id[{x[i], y[i]}] = i;
    }

    vector<int> U, V, A(n - 1), B(n - 1);

    vector<int> dx = {0, 2};
    vector<int> dy = {2, 0};

    for (int it = 0; it < dx.size(); it++){
        for (int i : perm){
            int X = x[i] + dx[it], Y = y[i] + dy[it];
            if (id.find({X, Y}) != id.end()){
                int j = id[{X, Y}];
                if (!unite(i, j)) continue;
                U.push_back(i);
                V.push_back(j);
            }
        }
    }

    if (U.size() != n - 1) return 0;

    for (int it = 0; it < n - 1; it++){
        int i = U[it], j = V[it];
        if (x[i] == x[j]){
            B[it] = (y[i] + y[j]) / 2;
            if (x[i] == 2) A[it] = 1;
            if (x[i] == 6) A[it] = 7;
            if (x[i] == 4) B[it] = -1;
        } else {
            A[it] = (x[i] + x[j]) / 2;
            B[it] = y[i] + (A[it] == 3 ? -1 : 1);
        }
    }

    set<pair<int, int>> points;
    for (int it = 0; it < n - 1; it++){
        if (B[it] != -1) points.insert(make_pair(A[it], B[it]));
    }

    for (int it = 0; it < n - 1; it++){
        int i = U[it], j = V[it];
        if (x[i] == x[j] && x[i] == 4){
            int Y = (y[i] + y[j]) / 2;

            if (points.find({3, Y}) == points.end()) A[it] = 3;
            else if (points.find({5, Y}) == points.end()) A[it] = 5; else
                return 0;

            B[it] = Y;
        }
    }

    build(U, V, A, B);

    return 1;
}

Compilation message

parks.cpp: In lambda function:
parks.cpp:35:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   35 |         return x[i] < x[j] || x[i] == x[j] && y[i] < y[j];
parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:50:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |     for (int it = 0; it < dx.size(); it++){
      |                      ~~~^~~~~~~~~~~
parks.cpp:62:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   62 |     if (U.size() != n - 1) return 0;
      |         ~~~~~~~~~^~~~~~~~

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 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 135 ms 19084 KB Output is correct
10 Correct 10 ms 2244 KB Output is correct
11 Correct 63 ms 10388 KB Output is correct
12 Correct 15 ms 3312 KB Output is correct
13 Correct 38 ms 5312 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 440 KB Output is correct
16 Correct 140 ms 19108 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 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 135 ms 19084 KB Output is correct
10 Correct 10 ms 2244 KB Output is correct
11 Correct 63 ms 10388 KB Output is correct
12 Correct 15 ms 3312 KB Output is correct
13 Correct 38 ms 5312 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 440 KB Output is correct
16 Correct 140 ms 19108 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 1 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 347 ms 33724 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 2 ms 416 KB Output is correct
26 Correct 2 ms 588 KB Output is correct
27 Correct 4 ms 716 KB Output is correct
28 Correct 114 ms 13620 KB Output is correct
29 Correct 174 ms 20456 KB Output is correct
30 Correct 245 ms 27124 KB Output is correct
31 Correct 371 ms 33584 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 304 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 1 ms 300 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 2 ms 460 KB Output is correct
44 Correct 2 ms 588 KB Output is correct
45 Correct 135 ms 17444 KB Output is correct
46 Correct 220 ms 25212 KB Output is correct
47 Correct 261 ms 25180 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 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 135 ms 19084 KB Output is correct
10 Correct 10 ms 2244 KB Output is correct
11 Correct 63 ms 10388 KB Output is correct
12 Correct 15 ms 3312 KB Output is correct
13 Correct 38 ms 5312 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 440 KB Output is correct
16 Correct 140 ms 19108 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 1 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 347 ms 33724 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 2 ms 416 KB Output is correct
26 Correct 2 ms 588 KB Output is correct
27 Correct 4 ms 716 KB Output is correct
28 Correct 114 ms 13620 KB Output is correct
29 Correct 174 ms 20456 KB Output is correct
30 Correct 245 ms 27124 KB Output is correct
31 Correct 371 ms 33584 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 304 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 1 ms 300 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 2 ms 460 KB Output is correct
44 Correct 2 ms 588 KB Output is correct
45 Correct 135 ms 17444 KB Output is correct
46 Correct 220 ms 25212 KB Output is correct
47 Correct 261 ms 25180 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 1 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Incorrect 0 ms 204 KB Solution announced impossible, but it is possible.
54 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 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 135 ms 19084 KB Output is correct
10 Correct 10 ms 2244 KB Output is correct
11 Correct 63 ms 10388 KB Output is correct
12 Correct 15 ms 3312 KB Output is correct
13 Correct 38 ms 5312 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 440 KB Output is correct
16 Correct 140 ms 19108 KB Output is correct
17 Incorrect 0 ms 300 KB a[0] = 0 is not an odd integer
18 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 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 135 ms 19084 KB Output is correct
10 Correct 10 ms 2244 KB Output is correct
11 Correct 63 ms 10388 KB Output is correct
12 Correct 15 ms 3312 KB Output is correct
13 Correct 38 ms 5312 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 440 KB Output is correct
16 Correct 140 ms 19108 KB Output is correct
17 Incorrect 403 ms 37988 KB a[50000] = 0 is not an odd integer
18 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 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 135 ms 19084 KB Output is correct
10 Correct 10 ms 2244 KB Output is correct
11 Correct 63 ms 10388 KB Output is correct
12 Correct 15 ms 3312 KB Output is correct
13 Correct 38 ms 5312 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 440 KB Output is correct
16 Correct 140 ms 19108 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 1 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 347 ms 33724 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 2 ms 416 KB Output is correct
26 Correct 2 ms 588 KB Output is correct
27 Correct 4 ms 716 KB Output is correct
28 Correct 114 ms 13620 KB Output is correct
29 Correct 174 ms 20456 KB Output is correct
30 Correct 245 ms 27124 KB Output is correct
31 Correct 371 ms 33584 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 304 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 1 ms 300 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 2 ms 460 KB Output is correct
44 Correct 2 ms 588 KB Output is correct
45 Correct 135 ms 17444 KB Output is correct
46 Correct 220 ms 25212 KB Output is correct
47 Correct 261 ms 25180 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 1 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Incorrect 0 ms 204 KB Solution announced impossible, but it is possible.
54 Halted 0 ms 0 KB -