oj.uz

Submission #797920

# Submission time Handle Problem Language Result Execution time Memory
797920 2023-07-30T07:03:03 Z Magikarp4000 Connecting Supertrees (IOI20_supertrees) C++17
96 / 100
 180 ms 38216 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) {
        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 7 ms 2260 KB Output is correct
7 Correct 161 ms 30152 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 7 ms 2260 KB Output is correct
7 Correct 161 ms 30152 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 25944 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 7 ms 1748 KB Output is correct
17 Correct 70 ms 19016 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 42 ms 7796 KB Output is correct
21 Correct 154 ms 26560 KB Output is correct
22 Correct 149 ms 26048 KB Output is correct
23 Correct 160 ms 28072 KB Output is correct
24 Correct 149 ms 26036 KB Output is correct
25 Correct 62 ms 16576 KB Output is correct
26 Correct 59 ms 16064 KB Output is correct
27 Correct 159 ms 29132 KB Output is correct
28 Correct 154 ms 25948 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 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 6 ms 2036 KB Output is correct
9 Correct 152 ms 26044 KB Output is correct
10 Correct 1 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 174 ms 38204 KB Output is correct
14 Correct 1 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 70 ms 18892 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 38 ms 7868 KB Output is correct
22 Correct 151 ms 27600 KB Output is correct
23 Correct 153 ms 26048 KB Output is correct
24 Correct 180 ms 35312 KB Output is correct
25 Correct 60 ms 16060 KB Output is correct
26 Correct 62 ms 16828 KB Output is correct
27 Correct 150 ms 26056 KB Output is correct
28 Correct 167 ms 32188 KB Output is correct
29 Correct 60 ms 16076 KB Output is correct

Subtask #4
35.0 / 35.0

# 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 39 ms 7848 KB Output is correct
5 Correct 159 ms 26560 KB Output is correct
6 Correct 150 ms 26060 KB Output is correct
7 Correct 160 ms 28092 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 38 ms 7896 KB Output is correct
10 Correct 153 ms 27600 KB Output is correct
11 Correct 155 ms 26056 KB Output is correct
12 Correct 165 ms 35264 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 38 ms 7808 KB Output is correct
17 Correct 156 ms 27552 KB Output is correct
18 Correct 153 ms 27636 KB Output is correct
19 Correct 151 ms 26444 KB Output is correct
20 Correct 149 ms 26048 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 7 ms 2260 KB Output is correct
7 Correct 161 ms 30152 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 25944 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 7 ms 1748 KB Output is correct
17 Correct 70 ms 19016 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 42 ms 7796 KB Output is correct
21 Correct 154 ms 26560 KB Output is correct
22 Correct 149 ms 26048 KB Output is correct
23 Correct 160 ms 28072 KB Output is correct
24 Correct 149 ms 26036 KB Output is correct
25 Correct 62 ms 16576 KB Output is correct
26 Correct 59 ms 16064 KB Output is correct
27 Correct 159 ms 29132 KB Output is correct
28 Correct 154 ms 25948 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 1 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 6 ms 2036 KB Output is correct
37 Correct 152 ms 26044 KB Output is correct
38 Correct 1 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 174 ms 38204 KB Output is correct
42 Correct 1 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 70 ms 18892 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 38 ms 7868 KB Output is correct
50 Correct 151 ms 27600 KB Output is correct
51 Correct 153 ms 26048 KB Output is correct
52 Correct 180 ms 35312 KB Output is correct
53 Correct 60 ms 16060 KB Output is correct
54 Correct 62 ms 16828 KB Output is correct
55 Correct 150 ms 26056 KB Output is correct
56 Correct 167 ms 32188 KB Output is correct
57 Correct 60 ms 16076 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 3 ms 1876 KB Output is correct
61 Correct 74 ms 20684 KB Output is correct
62 Correct 0 ms 340 KB Output is correct
63 Correct 0 ms 340 KB Output is correct
64 Correct 1 ms 340 KB Output is correct
65 Correct 38 ms 7796 KB Output is correct
66 Correct 61 ms 16832 KB Output is correct
67 Correct 63 ms 17092 KB Output is correct
68 Correct 60 ms 16332 KB Output is correct
69 Correct 60 ms 16072 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 7 ms 2260 KB Output is correct
7 Correct 161 ms 30152 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 25944 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 7 ms 1748 KB Output is correct
17 Correct 70 ms 19016 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 42 ms 7796 KB Output is correct
21 Correct 154 ms 26560 KB Output is correct
22 Correct 149 ms 26048 KB Output is correct
23 Correct 160 ms 28072 KB Output is correct
24 Correct 149 ms 26036 KB Output is correct
25 Correct 62 ms 16576 KB Output is correct
26 Correct 59 ms 16064 KB Output is correct
27 Correct 159 ms 29132 KB Output is correct
28 Correct 154 ms 25948 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 1 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 6 ms 2036 KB Output is correct
37 Correct 152 ms 26044 KB Output is correct
38 Correct 1 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 174 ms 38204 KB Output is correct
42 Correct 1 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 70 ms 18892 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 38 ms 7868 KB Output is correct
50 Correct 151 ms 27600 KB Output is correct
51 Correct 153 ms 26048 KB Output is correct
52 Correct 180 ms 35312 KB Output is correct
53 Correct 60 ms 16060 KB Output is correct
54 Correct 62 ms 16828 KB Output is correct
55 Correct 150 ms 26056 KB Output is correct
56 Correct 167 ms 32188 KB Output is correct
57 Correct 60 ms 16076 KB Output is correct
58 Correct 0 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 7848 KB Output is correct
62 Correct 159 ms 26560 KB Output is correct
63 Correct 150 ms 26060 KB Output is correct
64 Correct 160 ms 28092 KB Output is correct
65 Correct 0 ms 340 KB Output is correct
66 Correct 38 ms 7896 KB Output is correct
67 Correct 153 ms 27600 KB Output is correct
68 Correct 155 ms 26056 KB Output is correct
69 Correct 165 ms 35264 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 38 ms 7808 KB Output is correct
74 Correct 156 ms 27552 KB Output is correct
75 Correct 153 ms 27636 KB Output is correct
76 Correct 151 ms 26444 KB Output is correct
77 Correct 149 ms 26048 KB Output is correct
78 Correct 0 ms 340 KB Output is correct
79 Correct 1 ms 340 KB Output is correct
80 Correct 3 ms 1876 KB Output is correct
81 Correct 74 ms 20684 KB Output is correct
82 Correct 0 ms 340 KB Output is correct
83 Correct 0 ms 340 KB Output is correct
84 Correct 1 ms 340 KB Output is correct
85 Correct 38 ms 7796 KB Output is correct
86 Correct 61 ms 16832 KB Output is correct
87 Correct 63 ms 17092 KB Output is correct
88 Correct 60 ms 16332 KB Output is correct
89 Correct 60 ms 16072 KB Output is correct
90 Correct 0 ms 340 KB Output is correct
91 Correct 1 ms 340 KB Output is correct
92 Correct 3 ms 1876 KB Output is correct
93 Correct 71 ms 20668 KB Output is correct
94 Correct 0 ms 340 KB Output is correct
95 Correct 1 ms 340 KB Output is correct
96 Correct 0 ms 340 KB Output is correct
97 Correct 16 ms 5332 KB Output is correct
98 Correct 62 ms 16700 KB Output is correct
99 Correct 64 ms 17352 KB Output is correct
100 Correct 61 ms 16460 KB Output is correct
101 Correct 59 ms 16076 KB Output is correct
102 Incorrect 170 ms 38216 KB Answer gives possible 1 while actual possible 0
103 Halted 0 ms 0 KB -