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답안 #649755

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
649755 2022-10-11T10:28:02 Z welleyth Joker (BOI20_joker) C++17
14 / 100
 2000 ms 27424 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

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 4 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 5 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 4 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 4 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 4 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 5 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 4 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 4 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 81 ms 5076 KB Output is correct
30 Correct 93 ms 5124 KB Output is correct
31 Correct 81 ms 5140 KB Output is correct
32 Correct 56 ms 5136 KB Output is correct
33 Correct 41 ms 5124 KB Output is correct
34 Correct 80 ms 5148 KB Output is correct
35 Correct 98 ms 5144 KB Output is correct
36 Correct 51 ms 5248 KB Output is correct
37 Correct 125 ms 5192 KB Output is correct
38 Correct 135 ms 5136 KB Output is correct
39 Correct 82 ms 5076 KB Output is correct
40 Correct 58 ms 5176 KB Output is correct
41 Correct 55 ms 5124 KB Output is correct
42 Correct 53 ms 5132 KB Output is correct
43 Correct 63 ms 5120 KB Output is correct
44 Correct 69 ms 5124 KB Output is correct
45 Correct 82 ms 5132 KB Output is correct
46 Correct 82 ms 5136 KB Output is correct
47 Correct 58 ms 5076 KB Output is correct
48 Correct 63 ms 5120 KB Output is correct
49 Correct 74 ms 5068 KB Output is correct
50 Correct 86 ms 5120 KB Output is correct
51 Correct 54 ms 5116 KB Output is correct
52 Correct 66 ms 5108 KB Output is correct
53 Correct 76 ms 5116 KB Output is correct
54 Correct 96 ms 5076 KB Output is correct

Subtask #3
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Execution timed out 2083 ms 19728 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 4 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 5 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 4 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 4 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Execution timed out 2083 ms 19728 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 4 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 5 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 4 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 4 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 81 ms 5076 KB Output is correct
30 Correct 93 ms 5124 KB Output is correct
31 Correct 81 ms 5140 KB Output is correct
32 Correct 56 ms 5136 KB Output is correct
33 Correct 41 ms 5124 KB Output is correct
34 Correct 80 ms 5148 KB Output is correct
35 Correct 98 ms 5144 KB Output is correct
36 Correct 51 ms 5248 KB Output is correct
37 Correct 125 ms 5192 KB Output is correct
38 Correct 135 ms 5136 KB Output is correct
39 Correct 82 ms 5076 KB Output is correct
40 Correct 58 ms 5176 KB Output is correct
41 Correct 55 ms 5124 KB Output is correct
42 Correct 53 ms 5132 KB Output is correct
43 Correct 63 ms 5120 KB Output is correct
44 Correct 69 ms 5124 KB Output is correct
45 Correct 82 ms 5132 KB Output is correct
46 Correct 82 ms 5136 KB Output is correct
47 Correct 58 ms 5076 KB Output is correct
48 Correct 63 ms 5120 KB Output is correct
49 Correct 74 ms 5068 KB Output is correct
50 Correct 86 ms 5120 KB Output is correct
51 Correct 54 ms 5116 KB Output is correct
52 Correct 66 ms 5108 KB Output is correct
53 Correct 76 ms 5116 KB Output is correct
54 Correct 96 ms 5076 KB Output is correct
55 Execution timed out 2088 ms 27424 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 4 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 5 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 4 ms 4948 KB Output is correct
15 Correct 4 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 3 ms 4948 KB Output is correct
26 Correct 3 ms 4948 KB Output is correct
27 Correct 4 ms 4948 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 81 ms 5076 KB Output is correct
30 Correct 93 ms 5124 KB Output is correct
31 Correct 81 ms 5140 KB Output is correct
32 Correct 56 ms 5136 KB Output is correct
33 Correct 41 ms 5124 KB Output is correct
34 Correct 80 ms 5148 KB Output is correct
35 Correct 98 ms 5144 KB Output is correct
36 Correct 51 ms 5248 KB Output is correct
37 Correct 125 ms 5192 KB Output is correct
38 Correct 135 ms 5136 KB Output is correct
39 Correct 82 ms 5076 KB Output is correct
40 Correct 58 ms 5176 KB Output is correct
41 Correct 55 ms 5124 KB Output is correct
42 Correct 53 ms 5132 KB Output is correct
43 Correct 63 ms 5120 KB Output is correct
44 Correct 69 ms 5124 KB Output is correct
45 Correct 82 ms 5132 KB Output is correct
46 Correct 82 ms 5136 KB Output is correct
47 Correct 58 ms 5076 KB Output is correct
48 Correct 63 ms 5120 KB Output is correct
49 Correct 74 ms 5068 KB Output is correct
50 Correct 86 ms 5120 KB Output is correct
51 Correct 54 ms 5116 KB Output is correct
52 Correct 66 ms 5108 KB Output is correct
53 Correct 76 ms 5116 KB Output is correct
54 Correct 96 ms 5076 KB Output is correct
55 Execution timed out 2083 ms 19728 KB Time limit exceeded
56 Halted 0 ms 0 KB -