oj.uz

Submission #797931

# Submission time Handle Problem Language Result Execution time Memory
797931 2023-07-30T07:25:06 Z Magikarp4000 Connecting Supertrees (IOI20_supertrees) C++17
96 / 100
 169 ms 38152 KB 
// goofy ahh

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
#define OPTM ios_base::sync_with_stdio(0); cin.tie(0);
#define INF int(1e9+7)
#define ln '\n' 
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define us unsigned short
#define FOR(i,s,n) for (int i = s; i < n; i++)
#define FORR(i,n,s) for (int i = n; i > s; i--)
#define FORX(u, arr) for (auto u : arr)
#define PB push_back
#define in(v,x) (v.find(x) != v.end())
#define F first
#define S second
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define UM unordered_map
#define US unordered_set
#define PQ priority_queue
#define ALL(v) v.begin(), v.end()
const ll LLINF = 1e18+1;

const int MAXN = 1e3+5;
int n,wn,ma;
int a[MAXN][MAXN], d[MAXN], comp[MAXN];
vector<int> v[MAXN], v1[MAXN], goofy, w;
vector<vector<int>> b;
bool vis[MAXN], z[MAXN];

bool bfs(int start) {
    queue<int> q;
    FOR(i,0,wn) d[w[i]] = INF;
    d[start] = 0;
    q.push(start);
    while (!q.empty()) {
        int s = q.front();
        q.pop();
        FORX(u,v[s]) {
            if (d[s] == 1 && d[u] == 1) {
                if (ma == 2) {
                    goofy = {start,s,u};
                    return 1;
                }
                else {
                    FORX(y,v[u]) {
                        if (y == s || y == start) continue;
                        if (a[y][s] == 3 && d[y] == 1) {
                            goofy = {start,s,u,y};
                            return 1;
                        }
                    }
                }
            }
            if (d[s]+1 < 2 && d[s]+1 < d[u]) {
                d[u] = d[s]+1;
                q.push(u);
            }
        }
    }
    return 0;
}

void dfs(int s) {
    if (vis[s]) return;
    vis[s] = 1;
    w.PB(s);
    FORX(u,v1[s]) dfs(u);
}

bool solve() {
    goofy.clear();
    FOR(i,0,wn) if (bfs(w[i])) break;
    if (goofy.empty()) {
        FOR(i,0,wn) FOR(j,i+1,wn) if (a[w[i]][w[j]] == ma) return 0;
        FOR(i,0,wn-1) b[w[i]][w[i+1]] = b[w[i+1]][w[i]] = 1;
        return 1;
    }
    FORX(u,goofy) z[u] = 1;
    FOR(i,0,wn) {
        if (z[w[i]]) continue;
        bool ok = 1;
        FORX(u,goofy) if (a[w[i]][u] != ma) ok = 0;
        if (ok) z[w[i]] = 1, goofy.PB(w[i]);
    }
    // FORX(u,goofy) cout << u << " ";
    // cout << ln;
    int gn = goofy.size();
    FOR(i,0,wn) comp[w[i]] = -1;
    FORX(u,goofy) comp[u] = u;
    FOR(i,0,wn) {
        if (z[w[i]]) continue;
        FOR(j,0,wn) {
            if (i == j) continue;
            if (a[w[i]][w[j]] == 1 && z[w[j]]) {
                comp[w[i]] = w[j];
                break;
            }
        }
    }
    FOR(i,0,wn) {
        FOR(j,0,wn) {
            if (i == j) continue;
            if (a[w[i]][w[j]] == ma && comp[w[i]] == comp[w[j]]) return 0;
            if (a[w[i]][w[j]] == 1 && comp[w[i]] != comp[w[j]]) return 0;
        }
    }
    FOR(i,0,gn) b[goofy[i]][goofy[(i+1)%gn]] = b[goofy[(i+1)%gn]][goofy[i]] = 1;
    if (ma == 3) b[goofy[0]][goofy[2]] = b[goofy[2]][goofy[0]] = 1;
    FOR(i,0,wn) if (!z[w[i]]) b[w[i]][comp[w[i]]] = b[comp[w[i]]][w[i]] = 1;
    return 1;
}

bool precheck() {
    wn = w.size();
    FOR(i,0,wn) {
        FOR(j,0,wn) {
            if (a[w[i]][w[j]] == 0) return 0;
        }
    }
    bool xd[3] = {0,0,0};
    FOR(i,0,wn) {
        FOR(j,0,wn) xd[a[w[i]][w[j]]-1] = 1;
    }
    if (xd[1] && xd[2]) return 0;
    ma = xd[2] ? 3 : 2;
    FOR(i,0,wn) FOR(j,0,wn) if (a[w[i]][w[j]] == ma) v[w[i]].PB(w[j]), v[w[j]].PB(w[i]);
    return 1;
}

void reset() {
    FORX(u,w) v[u].clear();
    w.clear();
}

int construct(vector<vector<int>> P) {
	n = P.size();
    b.resize(n,vector<int>(n));
    FOR(i,0,n) FOR(j,0,n) a[i][j] = P[i][j];
    FOR(i,0,n) FOR(j,i+1,n) if (a[i][j]) v1[i].PB(j), v1[j].PB(i);
    FOR(i,0,n) FOR(j,0,n) if (a[i][j] == 3) {build(b); return 1;}
    FOR(i,0,n) {
        if (vis[i]) continue;
        reset();
        dfs(i);
        if (!precheck()) return 0;
        if (!solve()) return 0;
    }
    build(b);
    return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 9 ms 2260 KB Output is correct
7 Correct 161 ms 30196 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 9 ms 2260 KB Output is correct
7 Correct 161 ms 30196 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 7 ms 2004 KB Output is correct
13 Correct 152 ms 26044 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1748 KB Output is correct
17 Correct 71 ms 19020 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 41 ms 7840 KB Output is correct
21 Correct 152 ms 26572 KB Output is correct
22 Correct 149 ms 26060 KB Output is correct
23 Correct 160 ms 28104 KB Output is correct
24 Correct 151 ms 26044 KB Output is correct
25 Correct 63 ms 16592 KB Output is correct
26 Correct 61 ms 16072 KB Output is correct
27 Correct 161 ms 29120 KB Output is correct
28 Correct 153 ms 26048 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 7 ms 2004 KB Output is correct
9 Correct 149 ms 25932 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 7 ms 2644 KB Output is correct
13 Correct 169 ms 38152 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1748 KB Output is correct
17 Correct 82 ms 18880 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 40 ms 7876 KB Output is correct
22 Correct 152 ms 27580 KB Output is correct
23 Correct 149 ms 26044 KB Output is correct
24 Correct 167 ms 35264 KB Output is correct
25 Correct 63 ms 16060 KB Output is correct
26 Correct 63 ms 16832 KB Output is correct
27 Correct 154 ms 26096 KB Output is correct
28 Correct 166 ms 32192 KB Output is correct
29 Correct 62 ms 16060 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 39 ms 7780 KB Output is correct
5 Correct 152 ms 26572 KB Output is correct
6 Correct 153 ms 26048 KB Output is correct
7 Correct 160 ms 28096 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 42 ms 7876 KB Output is correct
10 Correct 155 ms 27584 KB Output is correct
11 Correct 149 ms 26044 KB Output is correct
12 Correct 164 ms 35272 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 39 ms 7804 KB Output is correct
17 Correct 152 ms 27548 KB Output is correct
18 Correct 157 ms 27576 KB Output is correct
19 Correct 161 ms 26564 KB Output is correct
20 Correct 149 ms 25996 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 9 ms 2260 KB Output is correct
7 Correct 161 ms 30196 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 7 ms 2004 KB Output is correct
13 Correct 152 ms 26044 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1748 KB Output is correct
17 Correct 71 ms 19020 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 41 ms 7840 KB Output is correct
21 Correct 152 ms 26572 KB Output is correct
22 Correct 149 ms 26060 KB Output is correct
23 Correct 160 ms 28104 KB Output is correct
24 Correct 151 ms 26044 KB Output is correct
25 Correct 63 ms 16592 KB Output is correct
26 Correct 61 ms 16072 KB Output is correct
27 Correct 161 ms 29120 KB Output is correct
28 Correct 153 ms 26048 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 7 ms 2004 KB Output is correct
37 Correct 149 ms 25932 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 7 ms 2644 KB Output is correct
41 Correct 169 ms 38152 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 3 ms 1748 KB Output is correct
45 Correct 82 ms 18880 KB Output is correct
46 Correct 0 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 40 ms 7876 KB Output is correct
50 Correct 152 ms 27580 KB Output is correct
51 Correct 149 ms 26044 KB Output is correct
52 Correct 167 ms 35264 KB Output is correct
53 Correct 63 ms 16060 KB Output is correct
54 Correct 63 ms 16832 KB Output is correct
55 Correct 154 ms 26096 KB Output is correct
56 Correct 166 ms 32192 KB Output is correct
57 Correct 62 ms 16060 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 0 ms 340 KB Output is correct
60 Correct 3 ms 1876 KB Output is correct
61 Correct 70 ms 20688 KB Output is correct
62 Correct 1 ms 340 KB Output is correct
63 Correct 0 ms 340 KB Output is correct
64 Correct 0 ms 340 KB Output is correct
65 Correct 39 ms 7852 KB Output is correct
66 Correct 62 ms 16840 KB Output is correct
67 Correct 62 ms 17088 KB Output is correct
68 Correct 61 ms 16332 KB Output is correct
69 Correct 61 ms 16068 KB Output is correct

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 9 ms 2260 KB Output is correct
7 Correct 161 ms 30196 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 7 ms 2004 KB Output is correct
13 Correct 152 ms 26044 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1748 KB Output is correct
17 Correct 71 ms 19020 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 41 ms 7840 KB Output is correct
21 Correct 152 ms 26572 KB Output is correct
22 Correct 149 ms 26060 KB Output is correct
23 Correct 160 ms 28104 KB Output is correct
24 Correct 151 ms 26044 KB Output is correct
25 Correct 63 ms 16592 KB Output is correct
26 Correct 61 ms 16072 KB Output is correct
27 Correct 161 ms 29120 KB Output is correct
28 Correct 153 ms 26048 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 7 ms 2004 KB Output is correct
37 Correct 149 ms 25932 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 7 ms 2644 KB Output is correct
41 Correct 169 ms 38152 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 3 ms 1748 KB Output is correct
45 Correct 82 ms 18880 KB Output is correct
46 Correct 0 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 40 ms 7876 KB Output is correct
50 Correct 152 ms 27580 KB Output is correct
51 Correct 149 ms 26044 KB Output is correct
52 Correct 167 ms 35264 KB Output is correct
53 Correct 63 ms 16060 KB Output is correct
54 Correct 63 ms 16832 KB Output is correct
55 Correct 154 ms 26096 KB Output is correct
56 Correct 166 ms 32192 KB Output is correct
57 Correct 62 ms 16060 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 0 ms 340 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 39 ms 7780 KB Output is correct
62 Correct 152 ms 26572 KB Output is correct
63 Correct 153 ms 26048 KB Output is correct
64 Correct 160 ms 28096 KB Output is correct
65 Correct 0 ms 340 KB Output is correct
66 Correct 42 ms 7876 KB Output is correct
67 Correct 155 ms 27584 KB Output is correct
68 Correct 149 ms 26044 KB Output is correct
69 Correct 164 ms 35272 KB Output is correct
70 Correct 0 ms 340 KB Output is correct
71 Correct 0 ms 340 KB Output is correct
72 Correct 0 ms 340 KB Output is correct
73 Correct 39 ms 7804 KB Output is correct
74 Correct 152 ms 27548 KB Output is correct
75 Correct 157 ms 27576 KB Output is correct
76 Correct 161 ms 26564 KB Output is correct
77 Correct 149 ms 25996 KB Output is correct
78 Correct 0 ms 340 KB Output is correct
79 Correct 0 ms 340 KB Output is correct
80 Correct 3 ms 1876 KB Output is correct
81 Correct 70 ms 20688 KB Output is correct
82 Correct 1 ms 340 KB Output is correct
83 Correct 0 ms 340 KB Output is correct
84 Correct 0 ms 340 KB Output is correct
85 Correct 39 ms 7852 KB Output is correct
86 Correct 62 ms 16840 KB Output is correct
87 Correct 62 ms 17088 KB Output is correct
88 Correct 61 ms 16332 KB Output is correct
89 Correct 61 ms 16068 KB Output is correct
90 Incorrect 0 ms 340 KB Answer gives possible 1 while actual possible 0
91 Halted 0 ms 0 KB -