oj.uz

Submission #433654

# Submission time Handle Problem Language Result Execution time Memory
433654 2021-06-20T09:15:28 Z magmag Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 300 ms 26076 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
 
struct UF {
    vi p, rnk;
    int nsets;
 
    UF(int n) {
        p = vi(n);
        for (int i = 0; i < n; ++i)p[i] = i;
        rnk = vi(n);
        nsets = n;
    }
 
    int parent(int i) {
        if (p[i] == i)return i;
        return p[i] = parent(p[i]);
    }
     
    bool check(int a, int b) {
        return parent(a) == parent(b);
    }
     
    void join(int a, int b) {
        if (check(a,b))return;
        nsets--;
     
        a = parent(a);
        b = parent(b);
     
        if (rnk[a] > rnk[b]) {
            p[b] = a;
        } else {
            p[b] = a;
            if (rnk[a] == rnk[b]) {
                rnk[b]++;
            }
        }
    }
};
 
int construct2(vector<vi> p) {
    int n = p.size();
 
    UF uf(n);
 
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (i == j)continue;
            if (p[i][j] == 2) {
                uf.join(i,j);
            } else {
                if (uf.check(i,j))return 0;
            }
        }
    }
 
    vector<vi> ring(n);
 
    for (int i = 0; i < n; ++i) {
        ring[uf.parent(i)].push_back(i);
    }
 
    vector<vi> ans(n, vi(n, 0));
 
    for (auto vv : ring) {
        if (vv.size() <= 1)continue;
        if (vv.size() == 2)return 0;
 
        for (int i = 0; i < vv.size(); ++i) {
            int pp = (i == 0 ? vv.back() : vv[i-1]);
            ans[vv[i]][pp] = 1;
            ans[pp][vv[i]] = 1;
        }
    }
    build(ans);
    return 1;
}
 
int construct(vector<vi> p) {
    int n = p.size();
 
    for (auto vv : p) {
        for (auto x : vv) {
            if (x == 2)return construct2(p);
        }
    }
 
    UF uf(n);
 
    vector<vi> ans(n, vi(n, 0));
 
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (i == j)continue;
            if (p[i][j]) {
                uf.join(i,j);
            } else {
                if (uf.check(i,j))return 0;
            }
        }
    }
 
    for (int i = 0; i < n; ++i) {
        int par = uf.parent(i);
        if (par == i)continue;
        ans[i][par] = 1;
        ans[par][i] = 1;
    }
 
    build(ans);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct2(std::vector<std::vector<int> >)':
supertrees.cpp:72:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         for (int i = 0; i < vv.size(); ++i) {
      |                         ~~^~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 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 1 ms 204 KB Output is correct
6 Correct 11 ms 1180 KB Output is correct
7 Correct 252 ms 21980 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 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 1 ms 204 KB Output is correct
6 Correct 11 ms 1180 KB Output is correct
7 Correct 252 ms 21980 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1100 KB Output is correct
13 Correct 269 ms 22024 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 6 ms 704 KB Output is correct
17 Correct 105 ms 12024 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 61 ms 5700 KB Output is correct
21 Correct 253 ms 22016 KB Output is correct
22 Correct 293 ms 21988 KB Output is correct
23 Correct 254 ms 21928 KB Output is correct
24 Correct 231 ms 21960 KB Output is correct
25 Correct 101 ms 12028 KB Output is correct
26 Correct 113 ms 12044 KB Output is correct
27 Correct 300 ms 22020 KB Output is correct
28 Correct 241 ms 21956 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 12 ms 1108 KB Output is correct
9 Correct 237 ms 21940 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 10 ms 1280 KB Output is correct
13 Correct 296 ms 25924 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 716 KB Output is correct
17 Correct 104 ms 12044 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 59 ms 6656 KB Output is correct
22 Correct 236 ms 25976 KB Output is correct
23 Correct 234 ms 25924 KB Output is correct
24 Correct 260 ms 26076 KB Output is correct
25 Correct 107 ms 16124 KB Output is correct
26 Correct 96 ms 12032 KB Output is correct
27 Correct 240 ms 25992 KB Output is correct
28 Correct 259 ms 25980 KB Output is correct
29 Correct 98 ms 16120 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 59 ms 5728 KB Output is correct
5 Correct 239 ms 22012 KB Output is correct
6 Correct 237 ms 22084 KB Output is correct
7 Correct 248 ms 22084 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 74 ms 6720 KB Output is correct
10 Correct 267 ms 25932 KB Output is correct
11 Correct 236 ms 25924 KB Output is correct
12 Correct 269 ms 25980 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Incorrect 0 ms 204 KB Too few ways to get from 4 to 5, should be 1 found 0
15 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 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 1 ms 204 KB Output is correct
6 Correct 11 ms 1180 KB Output is correct
7 Correct 252 ms 21980 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1100 KB Output is correct
13 Correct 269 ms 22024 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 6 ms 704 KB Output is correct
17 Correct 105 ms 12024 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 61 ms 5700 KB Output is correct
21 Correct 253 ms 22016 KB Output is correct
22 Correct 293 ms 21988 KB Output is correct
23 Correct 254 ms 21928 KB Output is correct
24 Correct 231 ms 21960 KB Output is correct
25 Correct 101 ms 12028 KB Output is correct
26 Correct 113 ms 12044 KB Output is correct
27 Correct 300 ms 22020 KB Output is correct
28 Correct 241 ms 21956 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 12 ms 1108 KB Output is correct
37 Correct 237 ms 21940 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 10 ms 1280 KB Output is correct
41 Correct 296 ms 25924 KB Output is correct
42 Correct 1 ms 204 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Correct 5 ms 716 KB Output is correct
45 Correct 104 ms 12044 KB Output is correct
46 Correct 0 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 59 ms 6656 KB Output is correct
50 Correct 236 ms 25976 KB Output is correct
51 Correct 234 ms 25924 KB Output is correct
52 Correct 260 ms 26076 KB Output is correct
53 Correct 107 ms 16124 KB Output is correct
54 Correct 96 ms 12032 KB Output is correct
55 Correct 240 ms 25992 KB Output is correct
56 Correct 259 ms 25980 KB Output is correct
57 Correct 98 ms 16120 KB Output is correct
58 Correct 0 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 5 ms 716 KB Output is correct
61 Correct 98 ms 12040 KB Output is correct
62 Correct 0 ms 204 KB Output is correct
63 Incorrect 1 ms 204 KB Too few ways to get from 0 to 1, should be 1 found 0
64 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 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 1 ms 204 KB Output is correct
6 Correct 11 ms 1180 KB Output is correct
7 Correct 252 ms 21980 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1100 KB Output is correct
13 Correct 269 ms 22024 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 6 ms 704 KB Output is correct
17 Correct 105 ms 12024 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 61 ms 5700 KB Output is correct
21 Correct 253 ms 22016 KB Output is correct
22 Correct 293 ms 21988 KB Output is correct
23 Correct 254 ms 21928 KB Output is correct
24 Correct 231 ms 21960 KB Output is correct
25 Correct 101 ms 12028 KB Output is correct
26 Correct 113 ms 12044 KB Output is correct
27 Correct 300 ms 22020 KB Output is correct
28 Correct 241 ms 21956 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 12 ms 1108 KB Output is correct
37 Correct 237 ms 21940 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 10 ms 1280 KB Output is correct
41 Correct 296 ms 25924 KB Output is correct
42 Correct 1 ms 204 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Correct 5 ms 716 KB Output is correct
45 Correct 104 ms 12044 KB Output is correct
46 Correct 0 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 59 ms 6656 KB Output is correct
50 Correct 236 ms 25976 KB Output is correct
51 Correct 234 ms 25924 KB Output is correct
52 Correct 260 ms 26076 KB Output is correct
53 Correct 107 ms 16124 KB Output is correct
54 Correct 96 ms 12032 KB Output is correct
55 Correct 240 ms 25992 KB Output is correct
56 Correct 259 ms 25980 KB Output is correct
57 Correct 98 ms 16120 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 0 ms 204 KB Output is correct
61 Correct 59 ms 5728 KB Output is correct
62 Correct 239 ms 22012 KB Output is correct
63 Correct 237 ms 22084 KB Output is correct
64 Correct 248 ms 22084 KB Output is correct
65 Correct 1 ms 204 KB Output is correct
66 Correct 74 ms 6720 KB Output is correct
67 Correct 267 ms 25932 KB Output is correct
68 Correct 236 ms 25924 KB Output is correct
69 Correct 269 ms 25980 KB Output is correct
70 Correct 1 ms 204 KB Output is correct
71 Incorrect 0 ms 204 KB Too few ways to get from 4 to 5, should be 1 found 0
72 Halted 0 ms 0 KB -