oj.uz

Submission #649754

# Submission time Handle Problem Language Result Execution time Memory
649754 2022-10-11T10:26:34 Z welleyth Joker (BOI20_joker) C++17
14 / 100
 2000 ms 32944 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#define int long long
#define pb push_back
#define mp make_pair

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

constexpr int N = (int)2e5 + 111;
constexpr int md = (int)2e5 + 111;

mt19937 rnd(time(nullptr));

vector<int> g[N];
bool used[2][N];
bool c[2][N];

bool dfs(int v,int r,int pr = -1){
    used[r][v] = true;
    c[r][v] = true;
    for(auto& to : g[v]){
        if(pr == to)
            continue;
        if(used[r^1][to]){
            if(c[r][v]&c[r][to])
                return true;
            continue;
        }
        c[r^1][to] = true;
        if(dfs(to,r^1,v))
            return true;
    }
    return false;
}

void solve(){
    int n,m,q;
    cin >> n >> m >> q;

    vector<pair<int,int>> edges;
    for(int i = 0; i < m; i++){
        int a,b;
        cin >> a >> b;
        edges.pb(mp(a,b));
    }

    for(int i = 0; i < q; i++){
        int l,r;
        cin >> l >> r;
        for(int j = 0; j <= n; j++){
            used[0][j] = false;
            used[1][j] = false;
            c[0][j] = c[1][j] = 0;
            g[j].clear();
        }
        for(int j = 0; j < l-1; j++){
            auto&[a,b] = edges[j];
            g[a].pb(b);
            g[b].pb(a);
        }
        for(int j = r; j <= m-1; j++){
            auto&[a,b] = edges[j];
            g[a].pb(b);
            g[b].pb(a);
        }
        bool ok = false;
        for(int j = 1; j <= n; j++){
            if(!used[0][j] && !used[1][j]){
                c[0][j] = 1;
                if(dfs(j,0)){
                    cout << "YES\n";
                    ok = true;
                    break;
                }
            }
        }
        if(!ok){
            cout << "NO\n";
        }
    }

    return;
}

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
//    init();
    int tests = 1;
//    cin >> tests;
    for(int test = 1; test <= tests; test++){
//        cerr << "test = " << test << "\n";
        solve();
    }
    return 0;
}
/**
6 8 2
1 3
1 5
1 6
2 5
2 6
3 4
3 5
5 6
4 7
4 8

**/

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4976 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 4980 KB Output is correct
16 Correct 4 ms 4956 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 5 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 4 ms 4948 KB Output is correct
22 Correct 4 ms 4996 KB Output is correct
23 Correct 5 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 3 ms 5056 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4976 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 4980 KB Output is correct
16 Correct 4 ms 4956 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 5 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 4 ms 4948 KB Output is correct
22 Correct 4 ms 4996 KB Output is correct
23 Correct 5 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 3 ms 5056 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 88 ms 5092 KB Output is correct
30 Correct 91 ms 5156 KB Output is correct
31 Correct 78 ms 5168 KB Output is correct
32 Correct 63 ms 5204 KB Output is correct
33 Correct 44 ms 5156 KB Output is correct
34 Correct 77 ms 5168 KB Output is correct
35 Correct 94 ms 5176 KB Output is correct
36 Correct 52 ms 5336 KB Output is correct
37 Correct 132 ms 5256 KB Output is correct
38 Correct 130 ms 5204 KB Output is correct
39 Correct 80 ms 5168 KB Output is correct
40 Correct 59 ms 5256 KB Output is correct
41 Correct 54 ms 5204 KB Output is correct
42 Correct 51 ms 5184 KB Output is correct
43 Correct 48 ms 5168 KB Output is correct
44 Correct 67 ms 5180 KB Output is correct
45 Correct 77 ms 5204 KB Output is correct
46 Correct 73 ms 5188 KB Output is correct
47 Correct 61 ms 5188 KB Output is correct
48 Correct 60 ms 5184 KB Output is correct
49 Correct 77 ms 5180 KB Output is correct
50 Correct 82 ms 5176 KB Output is correct
51 Correct 56 ms 5204 KB Output is correct
52 Correct 64 ms 5188 KB Output is correct
53 Correct 73 ms 5200 KB Output is correct
54 Correct 94 ms 5196 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Execution timed out 2053 ms 22812 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4976 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 4980 KB Output is correct
16 Correct 4 ms 4956 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 5 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 4 ms 4948 KB Output is correct
22 Correct 4 ms 4996 KB Output is correct
23 Correct 5 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 3 ms 5056 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Execution timed out 2053 ms 22812 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4976 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 4980 KB Output is correct
16 Correct 4 ms 4956 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 5 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 4 ms 4948 KB Output is correct
22 Correct 4 ms 4996 KB Output is correct
23 Correct 5 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 3 ms 5056 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 88 ms 5092 KB Output is correct
30 Correct 91 ms 5156 KB Output is correct
31 Correct 78 ms 5168 KB Output is correct
32 Correct 63 ms 5204 KB Output is correct
33 Correct 44 ms 5156 KB Output is correct
34 Correct 77 ms 5168 KB Output is correct
35 Correct 94 ms 5176 KB Output is correct
36 Correct 52 ms 5336 KB Output is correct
37 Correct 132 ms 5256 KB Output is correct
38 Correct 130 ms 5204 KB Output is correct
39 Correct 80 ms 5168 KB Output is correct
40 Correct 59 ms 5256 KB Output is correct
41 Correct 54 ms 5204 KB Output is correct
42 Correct 51 ms 5184 KB Output is correct
43 Correct 48 ms 5168 KB Output is correct
44 Correct 67 ms 5180 KB Output is correct
45 Correct 77 ms 5204 KB Output is correct
46 Correct 73 ms 5188 KB Output is correct
47 Correct 61 ms 5188 KB Output is correct
48 Correct 60 ms 5184 KB Output is correct
49 Correct 77 ms 5180 KB Output is correct
50 Correct 82 ms 5176 KB Output is correct
51 Correct 56 ms 5204 KB Output is correct
52 Correct 64 ms 5188 KB Output is correct
53 Correct 73 ms 5200 KB Output is correct
54 Correct 94 ms 5196 KB Output is correct
55 Execution timed out 2051 ms 32944 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4976 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 4 ms 4948 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 4980 KB Output is correct
16 Correct 4 ms 4956 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 4 ms 4948 KB Output is correct
19 Correct 5 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 4 ms 4948 KB Output is correct
22 Correct 4 ms 4996 KB Output is correct
23 Correct 5 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 3 ms 5056 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 3 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 88 ms 5092 KB Output is correct
30 Correct 91 ms 5156 KB Output is correct
31 Correct 78 ms 5168 KB Output is correct
32 Correct 63 ms 5204 KB Output is correct
33 Correct 44 ms 5156 KB Output is correct
34 Correct 77 ms 5168 KB Output is correct
35 Correct 94 ms 5176 KB Output is correct
36 Correct 52 ms 5336 KB Output is correct
37 Correct 132 ms 5256 KB Output is correct
38 Correct 130 ms 5204 KB Output is correct
39 Correct 80 ms 5168 KB Output is correct
40 Correct 59 ms 5256 KB Output is correct
41 Correct 54 ms 5204 KB Output is correct
42 Correct 51 ms 5184 KB Output is correct
43 Correct 48 ms 5168 KB Output is correct
44 Correct 67 ms 5180 KB Output is correct
45 Correct 77 ms 5204 KB Output is correct
46 Correct 73 ms 5188 KB Output is correct
47 Correct 61 ms 5188 KB Output is correct
48 Correct 60 ms 5184 KB Output is correct
49 Correct 77 ms 5180 KB Output is correct
50 Correct 82 ms 5176 KB Output is correct
51 Correct 56 ms 5204 KB Output is correct
52 Correct 64 ms 5188 KB Output is correct
53 Correct 73 ms 5200 KB Output is correct
54 Correct 94 ms 5196 KB Output is correct
55 Execution timed out 2053 ms 22812 KB Time limit exceeded
56 Halted 0 ms 0 KB -