oj.uz

Submission #798339

# Submission time Handle Problem Language Result Execution time Memory
798339 2023-07-30T15:42:24 Z PixelCat Simurgh (IOI17_simurgh) C++14
30 / 100
 203 ms 3912 KB 
#include "simurgh.h"

#ifdef NYAOWO
#include "grader.cpp"
#endif

#include <bits/stdc++.h>
#define For(i, a, b) for(int i = a; i <= b; i++)
#define Forr(i, a, b) for(int i = a; i >= b; i--)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sz(x) ((int)x.size())
#define eb emplace_back
// #define int LL
using namespace std;
using i32 = int32_t;
using LL = long long;
using pii = pair<int, int>;

const int MAXN = 500;

vector<pii> adj[MAXN + 10];  // { node, edge id }

struct Tree {
    set<int> edge;
    int par[MAXN + 10];
    int dep[MAXN + 10];
    int peid[MAXN + 10];
    vector<int> get_edges() {
        vector<int> ids;
        for(auto &i:edge) ids.eb(i);
        return ids;
    }
    int query() {
        // cerr << "query:";
        // out();
        return count_common_roads(get_edges());
    }
    void dfs(int x, int p, int d, int pe, bool tree_edge_only = true) {
        par[x] = p;
        dep[x] = d;
        peid[x] = pe;
        for(auto &i:adj[x]) if(i.F != p && dep[i.F] == 0) {
            if(tree_edge_only && !edge.count(i.S)) continue;
            else if(!tree_edge_only) edge.insert(i.S);
            dfs(i.F, x, d + 1, i.S, tree_edge_only);
        }
    }
    void add_edge(int a, int b, int id) {
        if(edge.count(id)) return;
        // cerr << "tree: \n";
        // For(i, 0, 3) cerr << par[i] << " \n"[i == 3];
        // For(i, 0, 3) cerr << peid[i] << " \n"[i == 3];
        memset(dep, 0, sizeof(dep));
        dfs(0, -1, 1, -1);
        int cnt = query();
        while(a != b) {
            if(dep[a] < dep[b]) swap(a, b);
            int id2 = peid[a];
            edge.erase(id2);
            edge.insert(id);
            // cerr << id2 << " -> " << id << "?\n";
            if(query() > cnt) return;
            edge.erase(id);
            edge.insert(id2);
            a = par[a];
        }
    }
    void out() {
        for(auto &i:get_edges()) {
            cerr << i << " ";
        }
        cerr << "\n";
    }
} tr;

vector<int> find_roads(int N, vector<int> U, vector<int> V) {
    int M = sz(U);
    For(i, 0, M - 1) {
        adj[U[i]].eb(V[i], i);
        adj[V[i]].eb(U[i], i);
    }
    tr.dfs(0, -1, 1, -1, false);
    // tr.out();
    For(i, 0, M - 1) {
        tr.add_edge(U[i], V[i], i);
        // tr.out();
    }
    return tr.get_edges();
    // vector<int> r(n - 1);
    // for(int i = 0; i < n - 1; i++)
    //     r[i] = i;
    // int common = count_common_roads(r);
    // if(common == n - 1)
    //     return r;
    // r[0] = n - 1;
    // return r;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 1 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 1 ms 324 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 1 ms 324 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 0 ms 312 KB correct
13 Correct 0 ms 320 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 1 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 1 ms 324 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 1 ms 324 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 0 ms 312 KB correct
13 Correct 0 ms 320 KB correct
14 Correct 35 ms 340 KB correct
15 Correct 27 ms 384 KB correct
16 Correct 29 ms 340 KB correct
17 Correct 24 ms 380 KB correct
18 Correct 6 ms 340 KB correct
19 Correct 25 ms 324 KB correct
20 Correct 20 ms 380 KB correct
21 Correct 19 ms 372 KB correct
22 Correct 9 ms 340 KB correct
23 Correct 8 ms 340 KB correct
24 Correct 7 ms 340 KB correct
25 Correct 1 ms 316 KB correct
26 Correct 7 ms 340 KB correct
27 Correct 8 ms 340 KB correct
28 Correct 3 ms 340 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 9 ms 340 KB correct
31 Correct 10 ms 340 KB correct
32 Correct 9 ms 340 KB correct
33 Correct 9 ms 320 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 1 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 1 ms 324 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 1 ms 324 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 0 ms 312 KB correct
13 Correct 0 ms 320 KB correct
14 Correct 35 ms 340 KB correct
15 Correct 27 ms 384 KB correct
16 Correct 29 ms 340 KB correct
17 Correct 24 ms 380 KB correct
18 Correct 6 ms 340 KB correct
19 Correct 25 ms 324 KB correct
20 Correct 20 ms 380 KB correct
21 Correct 19 ms 372 KB correct
22 Correct 9 ms 340 KB correct
23 Correct 8 ms 340 KB correct
24 Correct 7 ms 340 KB correct
25 Correct 1 ms 316 KB correct
26 Correct 7 ms 340 KB correct
27 Correct 8 ms 340 KB correct
28 Correct 3 ms 340 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 9 ms 340 KB correct
31 Correct 10 ms 340 KB correct
32 Correct 9 ms 340 KB correct
33 Correct 9 ms 320 KB correct
34 Incorrect 203 ms 1548 KB WA in grader: NO
35 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Incorrect 104 ms 3912 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 212 KB correct
3 Correct 1 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 1 ms 324 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 1 ms 324 KB correct
11 Correct 0 ms 212 KB correct
12 Correct 0 ms 312 KB correct
13 Correct 0 ms 320 KB correct
14 Correct 35 ms 340 KB correct
15 Correct 27 ms 384 KB correct
16 Correct 29 ms 340 KB correct
17 Correct 24 ms 380 KB correct
18 Correct 6 ms 340 KB correct
19 Correct 25 ms 324 KB correct
20 Correct 20 ms 380 KB correct
21 Correct 19 ms 372 KB correct
22 Correct 9 ms 340 KB correct
23 Correct 8 ms 340 KB correct
24 Correct 7 ms 340 KB correct
25 Correct 1 ms 316 KB correct
26 Correct 7 ms 340 KB correct
27 Correct 8 ms 340 KB correct
28 Correct 3 ms 340 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 9 ms 340 KB correct
31 Correct 10 ms 340 KB correct
32 Correct 9 ms 340 KB correct
33 Correct 9 ms 320 KB correct
34 Incorrect 203 ms 1548 KB WA in grader: NO
35 Halted 0 ms 0 KB -