oj.uz

Submission #613986

# Submission time Handle Problem Language Result Execution time Memory
613986 2022-07-30T15:43:08 Z dxz05 Fountain Parks (IOI21_parks) C++17
30 / 100
 434 ms 55384 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;

    int k = 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 || x[i] == 6){
                A[it] = (x[i] == 2 ? 1 : 7);
            } else {
                if (k){
                    A[it] = x[i] - 1;
                } else {
                    A[it] = x[i] + 1;
                }
                k ^= 1;
            }
            benches.insert(MP(A[it], B[it]));
        }
    }

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

    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 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 170 ms 19492 KB Output is correct
10 Correct 11 ms 2292 KB Output is correct
11 Correct 74 ms 10624 KB Output is correct
12 Correct 17 ms 3332 KB Output is correct
13 Correct 34 ms 5152 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 144 ms 19492 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 170 ms 19492 KB Output is correct
10 Correct 11 ms 2292 KB Output is correct
11 Correct 74 ms 10624 KB Output is correct
12 Correct 17 ms 3332 KB Output is correct
13 Correct 34 ms 5152 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 144 ms 19492 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 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 369 ms 38712 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 4 ms 744 KB Output is correct
28 Correct 119 ms 15608 KB Output is correct
29 Correct 200 ms 23424 KB Output is correct
30 Correct 279 ms 31080 KB Output is correct
31 Correct 402 ms 38748 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 300 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 0 ms 304 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 3 ms 596 KB Output is correct
45 Correct 164 ms 19444 KB Output is correct
46 Correct 242 ms 28172 KB Output is correct
47 Correct 231 ms 28168 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 170 ms 19492 KB Output is correct
10 Correct 11 ms 2292 KB Output is correct
11 Correct 74 ms 10624 KB Output is correct
12 Correct 17 ms 3332 KB Output is correct
13 Correct 34 ms 5152 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 144 ms 19492 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 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 369 ms 38712 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 4 ms 744 KB Output is correct
28 Correct 119 ms 15608 KB Output is correct
29 Correct 200 ms 23424 KB Output is correct
30 Correct 279 ms 31080 KB Output is correct
31 Correct 402 ms 38748 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 300 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 0 ms 304 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 3 ms 596 KB Output is correct
45 Correct 164 ms 19444 KB Output is correct
46 Correct 242 ms 28172 KB Output is correct
47 Correct 231 ms 28168 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 300 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 304 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 387 ms 38672 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 2 ms 568 KB Output is correct
58 Correct 7 ms 1468 KB Output is correct
59 Correct 9 ms 1332 KB Output is correct
60 Correct 158 ms 19448 KB Output is correct
61 Correct 236 ms 26108 KB Output is correct
62 Correct 310 ms 32056 KB Output is correct
63 Correct 359 ms 38760 KB Output is correct
64 Correct 1 ms 300 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 342 ms 38688 KB Output is correct
68 Correct 350 ms 38852 KB Output is correct
69 Correct 377 ms 38540 KB Output is correct
70 Correct 3 ms 724 KB Output is correct
71 Correct 6 ms 1080 KB Output is correct
72 Correct 178 ms 19440 KB Output is correct
73 Correct 258 ms 29112 KB Output is correct
74 Correct 376 ms 38696 KB Output is correct
75 Correct 389 ms 38732 KB Output is correct
76 Correct 392 ms 38716 KB Output is correct
77 Correct 4 ms 852 KB Output is correct
78 Correct 9 ms 1236 KB Output is correct
79 Correct 152 ms 19480 KB Output is correct
80 Correct 255 ms 29088 KB Output is correct
81 Correct 434 ms 38768 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 170 ms 19492 KB Output is correct
10 Correct 11 ms 2292 KB Output is correct
11 Correct 74 ms 10624 KB Output is correct
12 Correct 17 ms 3332 KB Output is correct
13 Correct 34 ms 5152 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 144 ms 19492 KB Output is correct
17 Correct 2 ms 300 KB Output is correct
18 Correct 1 ms 296 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Runtime error 280 ms 55384 KB Execution killed with signal 6
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 170 ms 19492 KB Output is correct
10 Correct 11 ms 2292 KB Output is correct
11 Correct 74 ms 10624 KB Output is correct
12 Correct 17 ms 3332 KB Output is correct
13 Correct 34 ms 5152 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 144 ms 19492 KB Output is correct
17 Correct 372 ms 39152 KB Output is correct
18 Correct 395 ms 39256 KB Output is correct
19 Runtime error 277 ms 55096 KB Execution killed with signal 6
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 170 ms 19492 KB Output is correct
10 Correct 11 ms 2292 KB Output is correct
11 Correct 74 ms 10624 KB Output is correct
12 Correct 17 ms 3332 KB Output is correct
13 Correct 34 ms 5152 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 144 ms 19492 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 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 369 ms 38712 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 4 ms 744 KB Output is correct
28 Correct 119 ms 15608 KB Output is correct
29 Correct 200 ms 23424 KB Output is correct
30 Correct 279 ms 31080 KB Output is correct
31 Correct 402 ms 38748 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 300 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 0 ms 304 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 3 ms 596 KB Output is correct
45 Correct 164 ms 19444 KB Output is correct
46 Correct 242 ms 28172 KB Output is correct
47 Correct 231 ms 28168 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 300 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 304 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 387 ms 38672 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 2 ms 568 KB Output is correct
58 Correct 7 ms 1468 KB Output is correct
59 Correct 9 ms 1332 KB Output is correct
60 Correct 158 ms 19448 KB Output is correct
61 Correct 236 ms 26108 KB Output is correct
62 Correct 310 ms 32056 KB Output is correct
63 Correct 359 ms 38760 KB Output is correct
64 Correct 1 ms 300 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 342 ms 38688 KB Output is correct
68 Correct 350 ms 38852 KB Output is correct
69 Correct 377 ms 38540 KB Output is correct
70 Correct 3 ms 724 KB Output is correct
71 Correct 6 ms 1080 KB Output is correct
72 Correct 178 ms 19440 KB Output is correct
73 Correct 258 ms 29112 KB Output is correct
74 Correct 376 ms 38696 KB Output is correct
75 Correct 389 ms 38732 KB Output is correct
76 Correct 392 ms 38716 KB Output is correct
77 Correct 4 ms 852 KB Output is correct
78 Correct 9 ms 1236 KB Output is correct
79 Correct 152 ms 19480 KB Output is correct
80 Correct 255 ms 29088 KB Output is correct
81 Correct 434 ms 38768 KB Output is correct
82 Correct 2 ms 300 KB Output is correct
83 Correct 1 ms 296 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Runtime error 280 ms 55384 KB Execution killed with signal 6
86 Halted 0 ms 0 KB -