oj.uz

Submission #1047605

# Submission time Handle Problem Language Result Execution time Memory
1047605 2024-08-07T14:19:44 Z idas Connecting Supertrees (IOI20_supertrees) C++17
65 / 100
 118 ms 24152 KB 
#include "supertrees.h"
#include "bits/stdc++.h"
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define sz(x) ((int)((x).size()))
#define pb push_back

using namespace std;
typedef long long ll;
typedef vector<int> vi;

const int MxN=1e3+10;
int n, par[MxN], cyc[MxN];
bool v[MxN];

int fnd(int u) {
    return par[u]=par[u]==u?u:fnd(par[u]);
}

void mrg(int a, int b) {
    a=fnd(a); b=fnd(b);
    if(a==b) return;
    par[a]=b;
}

int construct(std::vector<std::vector<int>> p) {
    n=sz(p);

    FOR(i, 0, n) par[i]=i;

    vector b(n, vector(n, 0));
    FOR(i, 0, n) {
        FOR(j, 0, n) {
            if(fnd(i)==fnd(j)) continue;
            if(p[i][j]==1) {
                b[i][j]=b[j][i]=1;
                mrg(i, j);
            }
        }
    }

    vector used(n, false);
    FOR(i, 0, n) {
        int u=fnd(i);
        if(used[u]) continue;

        used[u]=true;
        cyc[u]=i;

        int cn=1, lst=u, frst=u;
        FOR(j, 0, n) {
            int w=fnd(j);
            if(used[w]) continue;

            if(p[u][w]==2) {
                used[w]=true;
                cyc[w]=i;
                cn++;

                b[lst][w]=b[w][lst]=1;
                lst=w;
            }
        }
        b[lst][frst]=b[frst][lst]=1;

        if(cn==2) {
            return 0;
        }
    }

    bool ok=true;
    FOR(i, 0, n) {
        FOR(j, 0, n) {
            int u=fnd(i), w=fnd(j);
            if(u==w) ok&=p[u][w]==1;
            else if(cyc[u]==cyc[w]) ok&=p[u][w]==2;
            else ok&=p[u][w]==0;
        }
    }

    FOR(i, 0, n) b[i][i]=0;

    if(!ok) return 0;

    build(b);

    return 1;
}
/*
Example 1:
4
1 1 2 2
1 1 2 2
2 2 1 2
2 2 2 1

Example 2:
2
1 0
0 1

Example 3:
2
1 3
3 1

5
1 1 2 2 2
1 1 2 2 2
2 2 1 2 2
2 2 2 1 1
2 2 2 1 1
*/

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 408 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 98 ms 23980 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 408 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 98 ms 23980 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1372 KB Output is correct
13 Correct 99 ms 24152 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 4 ms 1116 KB Output is correct
9 Correct 99 ms 22100 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1116 KB Output is correct
13 Correct 96 ms 22044 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 856 KB Output is correct
17 Correct 46 ms 12116 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 26 ms 5748 KB Output is correct
22 Correct 99 ms 22096 KB Output is correct
23 Correct 102 ms 22024 KB Output is correct
24 Correct 103 ms 22040 KB Output is correct
25 Correct 41 ms 12116 KB Output is correct
26 Correct 44 ms 12116 KB Output is correct
27 Correct 102 ms 22100 KB Output is correct
28 Correct 102 ms 22040 KB Output is correct
29 Correct 41 ms 12116 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 26 ms 6156 KB Output is correct
5 Correct 107 ms 24148 KB Output is correct
6 Correct 107 ms 24148 KB Output is correct
7 Correct 109 ms 24020 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 24 ms 6244 KB Output is correct
10 Correct 97 ms 23948 KB Output is correct
11 Correct 96 ms 24144 KB Output is correct
12 Correct 105 ms 23892 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 26 ms 6316 KB Output is correct
17 Correct 101 ms 23948 KB Output is correct
18 Correct 118 ms 24000 KB Output is correct
19 Correct 99 ms 23984 KB Output is correct
20 Correct 107 ms 23896 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 408 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 98 ms 23980 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1372 KB Output is correct
13 Correct 99 ms 24152 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 408 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 98 ms 23980 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1372 KB Output is correct
13 Correct 99 ms 24152 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -