oj.uz

Submission #613904

# Submission time Handle Problem Language Result Execution time Memory
613904 2022-07-30T12:50:26 Z dxz05 Fountain Parks (IOI21_parks) C++17
15 / 100
 368 ms 36068 KB 
#include "parks.h"
#include <bits/stdc++.h>

using namespace std;
#define MP make_pair
#define all(x) (x).begin(), (x).end()

struct dsu {
    vector<int> p, sz;
    dsu(int n) {
        p.assign(n, 0);
        sz.assign(n, 1);
        iota(p.begin(), p.end(), 0);
    }

    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 (sz[x] > sz[y]) swap(x, y);
        p[x] = y;
        sz[y] += sz[x];
        return true;
    }
};

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

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

    vector<int> U, V, A, B;
    
    vector<int> perm(n);
    iota(all(perm), 0);
    sort(all(perm), [&](int i, int j){
        return MP(x[i], y[i]) < MP(x[j], y[j]);
    });

    dsu d(n);
    for (int i : perm){
        if (id.find(MP(x[i], y[i] + 2)) == id.end()) continue;
        int j = id[MP(x[i], y[i] + 2)];
        if (d.unite(i, j)){
            U.push_back(i);
            V.push_back(j);
        }
    }

    for (int i : perm) {
        if (id.find(MP(x[i] + 2, y[i])) == id.end()) continue;
        int j = id[MP(x[i] + 2, y[i])];
        if (d.unite(i, j)) {
            U.push_back(i);
            V.push_back(j);
        }
    }

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

    A.resize(n - 1);
    B.resize(n - 1);

    set<pair<int, int>> benches;

    for (int it = 0; it < n - 1; it++){
        int i = U[it], j = V[it];
        if (x[i] == x[j]){
            if (x[i] == 2 || x[i] == 6){
                A[it] = (x[i] == 2 ? 1 : 7);
                B[it] = (y[i] + y[j]) / 2;
                benches.insert(MP(A[it], B[it]));
            }
        } else {
            int xx = (x[i] + x[j]) / 2;
            if (xx == 3){
                A[it] = xx;
                B[it] = y[i] - 1;
            } else {
                A[it] = xx;
                B[it] = y[i] + 1;
            }
            benches.insert(MP(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 yy = (y[i] + y[j]) / 2;
            B[it] = yy;
            if (!benches.count(MP(x[i] - 1, yy))){
                A[it] = x[i] - 1;
            } else {
                A[it] = x[i] + 1;
            }
        }
    }

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

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:68:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   68 |     if (U.size() != n - 1) return 0;
      |         ~~~~~~~~~^~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 153 ms 19536 KB Output is correct
10 Correct 10 ms 2388 KB Output is correct
11 Correct 64 ms 10560 KB Output is correct
12 Correct 18 ms 3336 KB Output is correct
13 Correct 33 ms 5232 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 19440 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 153 ms 19536 KB Output is correct
10 Correct 10 ms 2388 KB Output is correct
11 Correct 64 ms 10560 KB Output is correct
12 Correct 18 ms 3336 KB Output is correct
13 Correct 33 ms 5232 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 19440 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 368 ms 33716 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 432 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 3 ms 744 KB Output is correct
28 Correct 109 ms 13804 KB Output is correct
29 Correct 175 ms 20576 KB Output is correct
30 Correct 291 ms 27252 KB Output is correct
31 Correct 340 ms 34076 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 300 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 1 ms 296 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 1 ms 304 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 436 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 146 ms 17880 KB Output is correct
46 Correct 236 ms 25780 KB Output is correct
47 Correct 242 ms 25972 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 153 ms 19536 KB Output is correct
10 Correct 10 ms 2388 KB Output is correct
11 Correct 64 ms 10560 KB Output is correct
12 Correct 18 ms 3336 KB Output is correct
13 Correct 33 ms 5232 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 19440 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 368 ms 33716 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 432 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 3 ms 744 KB Output is correct
28 Correct 109 ms 13804 KB Output is correct
29 Correct 175 ms 20576 KB Output is correct
30 Correct 291 ms 27252 KB Output is correct
31 Correct 340 ms 34076 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 300 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 1 ms 296 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 1 ms 304 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 436 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 146 ms 17880 KB Output is correct
46 Correct 236 ms 25780 KB Output is correct
47 Correct 242 ms 25972 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Incorrect 1 ms 212 KB Tree @(5, 3) appears more than once: for edges on positions 1 and 5
54 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 153 ms 19536 KB Output is correct
10 Correct 10 ms 2388 KB Output is correct
11 Correct 64 ms 10560 KB Output is correct
12 Correct 18 ms 3336 KB Output is correct
13 Correct 33 ms 5232 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 19440 KB Output is correct
17 Incorrect 1 ms 212 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 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 153 ms 19536 KB Output is correct
10 Correct 10 ms 2388 KB Output is correct
11 Correct 64 ms 10560 KB Output is correct
12 Correct 18 ms 3336 KB Output is correct
13 Correct 33 ms 5232 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 19440 KB Output is correct
17 Incorrect 346 ms 36068 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 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 153 ms 19536 KB Output is correct
10 Correct 10 ms 2388 KB Output is correct
11 Correct 64 ms 10560 KB Output is correct
12 Correct 18 ms 3336 KB Output is correct
13 Correct 33 ms 5232 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 19440 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 368 ms 33716 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 432 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 3 ms 744 KB Output is correct
28 Correct 109 ms 13804 KB Output is correct
29 Correct 175 ms 20576 KB Output is correct
30 Correct 291 ms 27252 KB Output is correct
31 Correct 340 ms 34076 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 300 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 1 ms 296 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 1 ms 304 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 436 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 146 ms 17880 KB Output is correct
46 Correct 236 ms 25780 KB Output is correct
47 Correct 242 ms 25972 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Incorrect 1 ms 212 KB Tree @(5, 3) appears more than once: for edges on positions 1 and 5
54 Halted 0 ms 0 KB -