oj.uz

Submission #613942

# Submission time Handle Problem Language Result Execution time Memory
613942 2022-07-30T14:02:29 Z dxz05 Fountain Parks (IOI21_parks) C++17
15 / 100
 409 ms 37432 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 
            if (!benches.count(MP(x[i] + 1, yy))){
                A[it] = x[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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 149 ms 18852 KB Output is correct
10 Correct 11 ms 2388 KB Output is correct
11 Correct 65 ms 10448 KB Output is correct
12 Correct 17 ms 3420 KB Output is correct
13 Correct 34 ms 5080 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 151 ms 19048 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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 149 ms 18852 KB Output is correct
10 Correct 11 ms 2388 KB Output is correct
11 Correct 65 ms 10448 KB Output is correct
12 Correct 17 ms 3420 KB Output is correct
13 Correct 34 ms 5080 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 151 ms 19048 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 389 ms 37432 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 3 ms 436 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 3 ms 696 KB Output is correct
28 Correct 123 ms 15272 KB Output is correct
29 Correct 207 ms 22660 KB Output is correct
30 Correct 275 ms 29948 KB Output is correct
31 Correct 386 ms 37432 KB Output is correct
32 Correct 0 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 212 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 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 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 468 KB Output is correct
44 Correct 3 ms 596 KB Output is correct
45 Correct 170 ms 18944 KB Output is correct
46 Correct 243 ms 27216 KB Output is correct
47 Correct 269 ms 27252 KB Output is correct

Subtask #3
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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 149 ms 18852 KB Output is correct
10 Correct 11 ms 2388 KB Output is correct
11 Correct 65 ms 10448 KB Output is correct
12 Correct 17 ms 3420 KB Output is correct
13 Correct 34 ms 5080 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 151 ms 19048 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 389 ms 37432 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 3 ms 436 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 3 ms 696 KB Output is correct
28 Correct 123 ms 15272 KB Output is correct
29 Correct 207 ms 22660 KB Output is correct
30 Correct 275 ms 29948 KB Output is correct
31 Correct 386 ms 37432 KB Output is correct
32 Correct 0 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 212 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 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 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 468 KB Output is correct
44 Correct 3 ms 596 KB Output is correct
45 Correct 170 ms 18944 KB Output is correct
46 Correct 243 ms 27216 KB Output is correct
47 Correct 269 ms 27252 KB Output is correct
48 Correct 0 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 0 ms 212 KB Output is correct
52 Correct 0 ms 212 KB Output is correct
53 Runtime error 1 ms 340 KB Execution killed with signal 6
54 Halted 0 ms 0 KB -

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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 149 ms 18852 KB Output is correct
10 Correct 11 ms 2388 KB Output is correct
11 Correct 65 ms 10448 KB Output is correct
12 Correct 17 ms 3420 KB Output is correct
13 Correct 34 ms 5080 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 151 ms 19048 KB Output is correct
17 Incorrect 1 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 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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 149 ms 18852 KB Output is correct
10 Correct 11 ms 2388 KB Output is correct
11 Correct 65 ms 10448 KB Output is correct
12 Correct 17 ms 3420 KB Output is correct
13 Correct 34 ms 5080 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 151 ms 19048 KB Output is correct
17 Incorrect 409 ms 35164 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 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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 149 ms 18852 KB Output is correct
10 Correct 11 ms 2388 KB Output is correct
11 Correct 65 ms 10448 KB Output is correct
12 Correct 17 ms 3420 KB Output is correct
13 Correct 34 ms 5080 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 151 ms 19048 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 389 ms 37432 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 3 ms 436 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 3 ms 696 KB Output is correct
28 Correct 123 ms 15272 KB Output is correct
29 Correct 207 ms 22660 KB Output is correct
30 Correct 275 ms 29948 KB Output is correct
31 Correct 386 ms 37432 KB Output is correct
32 Correct 0 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 212 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 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 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 468 KB Output is correct
44 Correct 3 ms 596 KB Output is correct
45 Correct 170 ms 18944 KB Output is correct
46 Correct 243 ms 27216 KB Output is correct
47 Correct 269 ms 27252 KB Output is correct
48 Correct 0 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 0 ms 212 KB Output is correct
52 Correct 0 ms 212 KB Output is correct
53 Runtime error 1 ms 340 KB Execution killed with signal 6
54 Halted 0 ms 0 KB -