oj.uz

Submission #428885

# Submission time Handle Problem Language Result Execution time Memory
428885 2021-06-15T15:13:48 Z ACmachine Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 355 ms 194740 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
#define FOR(i, j, k, l) for(int i = (j); i < (k); i += (l))
#define FORD(i, j, k, l) for(int i = (j);i >= (k); i -= (l))
#define REP(i, n) FOR(i, 0, n, 1)
#define REPD(i, n) FORD(i, n, 0, 1)
#define pb push_back
typedef long long ll;
using namespace std;

struct dsu{
    vector<int> p;
    int n;
    dsu(int _n){
        p.resize(n, -1);
    }
    int find(int x){
        return (p[x] < 0 ? x : p[x] = find(p[x]));
    }
    bool sameSet(int u, int v){
        return (find(u) == find(v));
    }
    bool join(int a, int b){
        a = find(a); b = find(b);
        if(a == b) 
            return false;
        if(p[a] > p[b])
            swap(a, b);
        p[a] += p[b];
        p[b] = a;
        return true;
    }
};
int construct(vector<vector<int>> p) {
	int n = p.size();
    REP(i, n){
        REP(j, n){
            if(p[i][j] == 3)
                return 0;
        }
    }
	vector<vector<int>> answer(n, vector<int>(n, 0));
	dsu d(n);
    dsu d2(n); // with 2s. if multiple 1 repres are in same comp, then create cycle from them;
    
    REP(i, n){
        REP(j, i){
            if(p[i][j] == 1){
                d.join(i, j);
                d2.join(i, j);
            }
        }
    }
    REP(i, n){
        if(d.find(i) != i){
            int rp = d.find(i);
            answer[rp][i] = answer[i][rp] = 1;
        }
    }
    REP(i, n){
        REP(j, i){
            if(p[i][j] == 2)
                d2.join(i, j);
        }
    }
    vector<vector<int>> buckets(n);
    REP(i, n){
        if(d.find(i) == i){
            buckets[d2.find(i)].pb(i);
        }
    }
    // can't be 2 in p[i][j] = 2;
    REP(i, n){
        if(buckets[i].size() == 2)
            return 0;
        if(buckets[i].size() > 2){
            REP(j, buckets[i].size()){
                int u = buckets[i][j];
                int v = buckets[i][(j + 1) % buckets[i].size()];
                answer[u][v] = answer[v][u] = 1;
            }
        }
    }
    // now some connectivity checks;
    // d2 is final connectivity; d are 1 components
    // if p[i][j] == 0; they cant be connected in any way
    // if p[i][j] == 2, they can't be connected in d;
    REP(i, n){
        REP(j, i){
            if(p[i][j] == 0 && d2.sameSet(i, j))
                return 0;
            if(p[i][j] == 2 && d.sameSet(i, j))
                return 0;
        }
    }
	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:3:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    3 | #define FOR(i, j, k, l) for(int i = (j); i < (k); i += (l))
      |                                            ^
supertrees.cpp:5:19: note: in expansion of macro 'FOR'
    5 | #define REP(i, n) FOR(i, 0, n, 1)
      |                   ^~~
supertrees.cpp:77:13: note: in expansion of macro 'REP'
   77 |             REP(j, buckets[i].size()){
      |             ^~~
supertrees.cpp:15:18: warning: 'd.dsu::n' may be used uninitialized in this function [-Wmaybe-uninitialized]
   15 |         p.resize(n, -1);
      |                  ^
supertrees.cpp:15:18: warning: 'd2.dsu::n' may be used uninitialized in this function [-Wmaybe-uninitialized]
   15 |         p.resize(n, -1);
      |                  ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 134504 KB Output is correct
2 Correct 95 ms 175248 KB Output is correct
3 Correct 83 ms 138884 KB Output is correct
4 Correct 78 ms 140164 KB Output is correct
5 Correct 96 ms 173128 KB Output is correct
6 Correct 41 ms 58572 KB Output is correct
7 Correct 340 ms 161176 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 134504 KB Output is correct
2 Correct 95 ms 175248 KB Output is correct
3 Correct 83 ms 138884 KB Output is correct
4 Correct 78 ms 140164 KB Output is correct
5 Correct 96 ms 173128 KB Output is correct
6 Correct 41 ms 58572 KB Output is correct
7 Correct 340 ms 161176 KB Output is correct
8 Correct 83 ms 154020 KB Output is correct
9 Correct 33 ms 51908 KB Output is correct
10 Correct 84 ms 146280 KB Output is correct
11 Correct 58 ms 101152 KB Output is correct
12 Correct 81 ms 124380 KB Output is correct
13 Correct 322 ms 171360 KB Output is correct
14 Correct 88 ms 161860 KB Output is correct
15 Correct 92 ms 161624 KB Output is correct
16 Correct 97 ms 146332 KB Output is correct
17 Correct 172 ms 124576 KB Output is correct
18 Correct 90 ms 160112 KB Output is correct
19 Correct 96 ms 164896 KB Output is correct
20 Correct 129 ms 127980 KB Output is correct
21 Correct 271 ms 79084 KB Output is correct
22 Correct 281 ms 105196 KB Output is correct
23 Correct 355 ms 161004 KB Output is correct
24 Correct 330 ms 173840 KB Output is correct
25 Correct 214 ms 184944 KB Output is correct
26 Correct 143 ms 101228 KB Output is correct
27 Correct 347 ms 107752 KB Output is correct
28 Correct 315 ms 161656 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 90180 KB Output is correct
2 Correct 49 ms 88992 KB Output is correct
3 Correct 34 ms 56008 KB Output is correct
4 Correct 56 ms 106528 KB Output is correct
5 Correct 82 ms 156640 KB Output is correct
6 Correct 71 ms 118780 KB Output is correct
7 Correct 94 ms 160436 KB Output is correct
8 Correct 77 ms 116036 KB Output is correct
9 Correct 282 ms 71700 KB Output is correct
10 Correct 111 ms 167188 KB Output is correct
11 Correct 45 ms 81564 KB Output is correct
12 Correct 77 ms 117904 KB Output is correct
13 Correct 301 ms 123844 KB Output is correct
14 Correct 64 ms 100640 KB Output is correct
15 Correct 51 ms 81768 KB Output is correct
16 Correct 38 ms 54960 KB Output is correct
17 Correct 201 ms 134240 KB Output is correct
18 Correct 31 ms 53196 KB Output is correct
19 Correct 57 ms 92048 KB Output is correct
20 Correct 63 ms 103056 KB Output is correct
21 Correct 137 ms 148284 KB Output is correct
22 Correct 340 ms 129216 KB Output is correct
23 Correct 317 ms 133196 KB Output is correct
24 Correct 313 ms 91844 KB Output is correct
25 Correct 180 ms 138400 KB Output is correct
26 Correct 197 ms 148676 KB Output is correct
27 Correct 342 ms 194724 KB Output is correct
28 Correct 304 ms 103176 KB Output is correct
29 Correct 146 ms 92960 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 101496 KB Output is correct
2 Correct 64 ms 105744 KB Output is correct
3 Correct 34 ms 50764 KB Output is correct
4 Correct 155 ms 138372 KB Output is correct
5 Correct 348 ms 182464 KB Output is correct
6 Correct 262 ms 71356 KB Output is correct
7 Correct 336 ms 194740 KB Output is correct
8 Correct 79 ms 143556 KB Output is correct
9 Correct 107 ms 85532 KB Output is correct
10 Correct 267 ms 75384 KB Output is correct
11 Correct 296 ms 110052 KB Output is correct
12 Correct 330 ms 162420 KB Output is correct
13 Correct 54 ms 96580 KB Output is correct
14 Correct 30 ms 51140 KB Output is correct
15 Correct 85 ms 156996 KB Output is correct
16 Correct 106 ms 80692 KB Output is correct
17 Correct 270 ms 85532 KB Output is correct
18 Correct 324 ms 150724 KB Output is correct
19 Correct 279 ms 108360 KB Output is correct
20 Correct 296 ms 132932 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 134504 KB Output is correct
2 Correct 95 ms 175248 KB Output is correct
3 Correct 83 ms 138884 KB Output is correct
4 Correct 78 ms 140164 KB Output is correct
5 Correct 96 ms 173128 KB Output is correct
6 Correct 41 ms 58572 KB Output is correct
7 Correct 340 ms 161176 KB Output is correct
8 Correct 83 ms 154020 KB Output is correct
9 Correct 33 ms 51908 KB Output is correct
10 Correct 84 ms 146280 KB Output is correct
11 Correct 58 ms 101152 KB Output is correct
12 Correct 81 ms 124380 KB Output is correct
13 Correct 322 ms 171360 KB Output is correct
14 Correct 88 ms 161860 KB Output is correct
15 Correct 92 ms 161624 KB Output is correct
16 Correct 97 ms 146332 KB Output is correct
17 Correct 172 ms 124576 KB Output is correct
18 Correct 90 ms 160112 KB Output is correct
19 Correct 96 ms 164896 KB Output is correct
20 Correct 129 ms 127980 KB Output is correct
21 Correct 271 ms 79084 KB Output is correct
22 Correct 281 ms 105196 KB Output is correct
23 Correct 355 ms 161004 KB Output is correct
24 Correct 330 ms 173840 KB Output is correct
25 Correct 214 ms 184944 KB Output is correct
26 Correct 143 ms 101228 KB Output is correct
27 Correct 347 ms 107752 KB Output is correct
28 Correct 315 ms 161656 KB Output is correct
29 Correct 56 ms 90180 KB Output is correct
30 Correct 49 ms 88992 KB Output is correct
31 Correct 34 ms 56008 KB Output is correct
32 Correct 56 ms 106528 KB Output is correct
33 Correct 82 ms 156640 KB Output is correct
34 Correct 71 ms 118780 KB Output is correct
35 Correct 94 ms 160436 KB Output is correct
36 Correct 77 ms 116036 KB Output is correct
37 Correct 282 ms 71700 KB Output is correct
38 Correct 111 ms 167188 KB Output is correct
39 Correct 45 ms 81564 KB Output is correct
40 Correct 77 ms 117904 KB Output is correct
41 Correct 301 ms 123844 KB Output is correct
42 Correct 64 ms 100640 KB Output is correct
43 Correct 51 ms 81768 KB Output is correct
44 Correct 38 ms 54960 KB Output is correct
45 Correct 201 ms 134240 KB Output is correct
46 Correct 31 ms 53196 KB Output is correct
47 Correct 57 ms 92048 KB Output is correct
48 Correct 63 ms 103056 KB Output is correct
49 Correct 137 ms 148284 KB Output is correct
50 Correct 340 ms 129216 KB Output is correct
51 Correct 317 ms 133196 KB Output is correct
52 Correct 313 ms 91844 KB Output is correct
53 Correct 180 ms 138400 KB Output is correct
54 Correct 197 ms 148676 KB Output is correct
55 Correct 342 ms 194724 KB Output is correct
56 Correct 304 ms 103176 KB Output is correct
57 Correct 146 ms 92960 KB Output is correct
58 Correct 51 ms 95308 KB Output is correct
59 Correct 71 ms 122664 KB Output is correct
60 Correct 53 ms 84548 KB Output is correct
61 Correct 151 ms 69828 KB Output is correct
62 Correct 50 ms 86924 KB Output is correct
63 Correct 34 ms 55024 KB Output is correct
64 Correct 28 ms 45876 KB Output is correct
65 Correct 95 ms 72556 KB Output is correct
66 Correct 170 ms 143732 KB Output is correct
67 Correct 180 ms 169080 KB Output is correct
68 Correct 153 ms 96756 KB Output is correct
69 Correct 147 ms 103364 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 134504 KB Output is correct
2 Correct 95 ms 175248 KB Output is correct
3 Correct 83 ms 138884 KB Output is correct
4 Correct 78 ms 140164 KB Output is correct
5 Correct 96 ms 173128 KB Output is correct
6 Correct 41 ms 58572 KB Output is correct
7 Correct 340 ms 161176 KB Output is correct
8 Correct 83 ms 154020 KB Output is correct
9 Correct 33 ms 51908 KB Output is correct
10 Correct 84 ms 146280 KB Output is correct
11 Correct 58 ms 101152 KB Output is correct
12 Correct 81 ms 124380 KB Output is correct
13 Correct 322 ms 171360 KB Output is correct
14 Correct 88 ms 161860 KB Output is correct
15 Correct 92 ms 161624 KB Output is correct
16 Correct 97 ms 146332 KB Output is correct
17 Correct 172 ms 124576 KB Output is correct
18 Correct 90 ms 160112 KB Output is correct
19 Correct 96 ms 164896 KB Output is correct
20 Correct 129 ms 127980 KB Output is correct
21 Correct 271 ms 79084 KB Output is correct
22 Correct 281 ms 105196 KB Output is correct
23 Correct 355 ms 161004 KB Output is correct
24 Correct 330 ms 173840 KB Output is correct
25 Correct 214 ms 184944 KB Output is correct
26 Correct 143 ms 101228 KB Output is correct
27 Correct 347 ms 107752 KB Output is correct
28 Correct 315 ms 161656 KB Output is correct
29 Correct 56 ms 90180 KB Output is correct
30 Correct 49 ms 88992 KB Output is correct
31 Correct 34 ms 56008 KB Output is correct
32 Correct 56 ms 106528 KB Output is correct
33 Correct 82 ms 156640 KB Output is correct
34 Correct 71 ms 118780 KB Output is correct
35 Correct 94 ms 160436 KB Output is correct
36 Correct 77 ms 116036 KB Output is correct
37 Correct 282 ms 71700 KB Output is correct
38 Correct 111 ms 167188 KB Output is correct
39 Correct 45 ms 81564 KB Output is correct
40 Correct 77 ms 117904 KB Output is correct
41 Correct 301 ms 123844 KB Output is correct
42 Correct 64 ms 100640 KB Output is correct
43 Correct 51 ms 81768 KB Output is correct
44 Correct 38 ms 54960 KB Output is correct
45 Correct 201 ms 134240 KB Output is correct
46 Correct 31 ms 53196 KB Output is correct
47 Correct 57 ms 92048 KB Output is correct
48 Correct 63 ms 103056 KB Output is correct
49 Correct 137 ms 148284 KB Output is correct
50 Correct 340 ms 129216 KB Output is correct
51 Correct 317 ms 133196 KB Output is correct
52 Correct 313 ms 91844 KB Output is correct
53 Correct 180 ms 138400 KB Output is correct
54 Correct 197 ms 148676 KB Output is correct
55 Correct 342 ms 194724 KB Output is correct
56 Correct 304 ms 103176 KB Output is correct
57 Correct 146 ms 92960 KB Output is correct
58 Correct 64 ms 101496 KB Output is correct
59 Correct 64 ms 105744 KB Output is correct
60 Correct 34 ms 50764 KB Output is correct
61 Correct 155 ms 138372 KB Output is correct
62 Correct 348 ms 182464 KB Output is correct
63 Correct 262 ms 71356 KB Output is correct
64 Correct 336 ms 194740 KB Output is correct
65 Correct 79 ms 143556 KB Output is correct
66 Correct 107 ms 85532 KB Output is correct
67 Correct 267 ms 75384 KB Output is correct
68 Correct 296 ms 110052 KB Output is correct
69 Correct 330 ms 162420 KB Output is correct
70 Correct 54 ms 96580 KB Output is correct
71 Correct 30 ms 51140 KB Output is correct
72 Correct 85 ms 156996 KB Output is correct
73 Correct 106 ms 80692 KB Output is correct
74 Correct 270 ms 85532 KB Output is correct
75 Correct 324 ms 150724 KB Output is correct
76 Correct 279 ms 108360 KB Output is correct
77 Correct 296 ms 132932 KB Output is correct
78 Correct 51 ms 95308 KB Output is correct
79 Correct 71 ms 122664 KB Output is correct
80 Correct 53 ms 84548 KB Output is correct
81 Correct 151 ms 69828 KB Output is correct
82 Correct 50 ms 86924 KB Output is correct
83 Correct 34 ms 55024 KB Output is correct
84 Correct 28 ms 45876 KB Output is correct
85 Correct 95 ms 72556 KB Output is correct
86 Correct 170 ms 143732 KB Output is correct
87 Correct 180 ms 169080 KB Output is correct
88 Correct 153 ms 96756 KB Output is correct
89 Correct 147 ms 103364 KB Output is correct
90 Correct 1 ms 204 KB Output is correct
91 Correct 1 ms 204 KB Output is correct
92 Correct 4 ms 660 KB Output is correct
93 Correct 104 ms 10104 KB Output is correct
94 Correct 1 ms 204 KB Output is correct
95 Correct 1 ms 204 KB Output is correct
96 Correct 1 ms 204 KB Output is correct
97 Correct 24 ms 2680 KB Output is correct
98 Correct 94 ms 10092 KB Output is correct
99 Correct 98 ms 10052 KB Output is correct
100 Correct 94 ms 10092 KB Output is correct
101 Correct 98 ms 10104 KB Output is correct
102 Correct 100 ms 10052 KB Output is correct
103 Correct 98 ms 10100 KB Output is correct
104 Correct 96 ms 10104 KB Output is correct
105 Correct 110 ms 10104 KB Output is correct