oj.uz

Submission #649842

# Submission time Handle Problem Language Result Execution time Memory
649842 2022-10-11T11:55:18 Z welleyth Joker (BOI20_joker) C++17
39 / 100
 2000 ms 35576 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;
}

int n,m,q;
vector<pair<int,int>> edges;

bool can(int l,int 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();
    }
    bool have = false;
    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; j++){
        auto&[a,b] = edges[j];
        g[a].pb(b);
        g[b].pb(a);
    }
    for(int j = 1; j <= n; j++){
        if(!used[0][j] && !used[1][j]){
            c[0][j] = 1;
            if(dfs(j,0)){
                return true;
            }
        }
    }
    return false;
}

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

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

    bool answer[q];
    bool f = true;
    if(!can(1,0))
        f = false;

    vector<pair<int,int>> Queries[m+1];

    for(int i = 0; i < q; i++){
        int l,r;
        cin >> l >> r;
        if(!f){
            cout << "NO\n";
            continue;
        }
        Queries[l].pb(mp(r,i));
    }
    if(!f)
        return;
    for(int i = 0; i <= m; i++){
        if(Queries[i].empty())
            continue;
        if(Queries[i].size() < __lg(m+1)){
            for(auto&[r,id] : Queries[i]){
                if(can(i,r))
                    answer[id] = 1;
                else
                    answer[id] = 0;
            }
            continue;
        }
        if(!can(i,i)){
            for(auto&[r,id] : Queries[i]){
                answer[id] = 0;
            }
            continue;
        }
        int L = i, R = m+1;
        while(R - L > 1){
            int mid = (L+R)>>1;
            if(can(i,mid))
                L = mid;
            else
                R = mid;
        }
        for(auto&[r,id] : Queries[i]){
            if(r <= L)
                answer[id] = 1;
            else
                answer[id] = 0;
        }
    }

    for(int i = 0; i < q; i++){
        cout << (answer[i] ? "YES" : "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

**/

Compilation message

Joker.cpp: In function 'bool can(int, int)':
Joker.cpp:52:10: warning: unused variable 'have' [-Wunused-variable]
   52 |     bool have = false;
      |          ^~~~
Joker.cpp: In function 'void solve()':
Joker.cpp:104:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  104 |         if(Queries[i].size() < __lg(m+1)){
      |            ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4984 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4984 KB Output is correct
6 Correct 3 ms 4996 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5024 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5048 KB Output is correct
16 Correct 3 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 4 ms 5064 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 4976 KB Output is correct
22 Correct 3 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 4 ms 4948 KB Output is correct
26 Correct 4 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 4 ms 4948 KB Output is correct
2 Correct 3 ms 4984 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4984 KB Output is correct
6 Correct 3 ms 4996 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5024 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5048 KB Output is correct
16 Correct 3 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 4 ms 5064 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 4976 KB Output is correct
22 Correct 3 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 4 ms 4948 KB Output is correct
26 Correct 4 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 5 ms 5076 KB Output is correct
30 Correct 79 ms 5204 KB Output is correct
31 Correct 70 ms 5220 KB Output is correct
32 Correct 57 ms 5216 KB Output is correct
33 Correct 29 ms 5076 KB Output is correct
34 Correct 74 ms 5232 KB Output is correct
35 Correct 91 ms 5216 KB Output is correct
36 Correct 56 ms 5332 KB Output is correct
37 Correct 119 ms 5204 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 73 ms 5232 KB Output is correct
40 Correct 56 ms 5240 KB Output is correct
41 Correct 54 ms 5200 KB Output is correct
42 Correct 48 ms 5204 KB Output is correct
43 Correct 62 ms 5184 KB Output is correct
44 Correct 60 ms 5204 KB Output is correct
45 Correct 77 ms 5228 KB Output is correct
46 Correct 82 ms 5216 KB Output is correct
47 Correct 54 ms 5188 KB Output is correct
48 Correct 57 ms 5192 KB Output is correct
49 Correct 65 ms 5212 KB Output is correct
50 Correct 67 ms 5204 KB Output is correct
51 Correct 53 ms 5204 KB Output is correct
52 Correct 66 ms 5204 KB Output is correct
53 Correct 69 ms 5216 KB Output is correct
54 Correct 79 ms 5220 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4984 KB Output is correct
3 Correct 346 ms 25984 KB Output is correct
4 Correct 135 ms 19028 KB Output is correct
5 Correct 190 ms 22320 KB Output is correct
6 Correct 245 ms 20136 KB Output is correct
7 Correct 279 ms 19236 KB Output is correct
8 Correct 205 ms 20692 KB Output is correct
9 Correct 261 ms 20996 KB Output is correct
10 Correct 431 ms 20844 KB Output is correct
11 Correct 248 ms 19012 KB Output is correct
12 Correct 307 ms 20620 KB Output is correct
13 Correct 168 ms 18408 KB Output is correct
14 Correct 195 ms 20456 KB Output is correct
15 Correct 360 ms 20112 KB Output is correct
16 Correct 453 ms 20892 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4984 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4984 KB Output is correct
6 Correct 3 ms 4996 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5024 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5048 KB Output is correct
16 Correct 3 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 4 ms 5064 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 4976 KB Output is correct
22 Correct 3 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 4 ms 4948 KB Output is correct
26 Correct 4 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 346 ms 25984 KB Output is correct
30 Correct 135 ms 19028 KB Output is correct
31 Correct 190 ms 22320 KB Output is correct
32 Correct 245 ms 20136 KB Output is correct
33 Correct 279 ms 19236 KB Output is correct
34 Correct 205 ms 20692 KB Output is correct
35 Correct 261 ms 20996 KB Output is correct
36 Correct 431 ms 20844 KB Output is correct
37 Correct 248 ms 19012 KB Output is correct
38 Correct 307 ms 20620 KB Output is correct
39 Correct 168 ms 18408 KB Output is correct
40 Correct 195 ms 20456 KB Output is correct
41 Correct 360 ms 20112 KB Output is correct
42 Correct 453 ms 20892 KB Output is correct
43 Execution timed out 2073 ms 35576 KB Time limit exceeded
44 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4984 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4984 KB Output is correct
6 Correct 3 ms 4996 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5024 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5048 KB Output is correct
16 Correct 3 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 4 ms 5064 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 4976 KB Output is correct
22 Correct 3 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 4 ms 4948 KB Output is correct
26 Correct 4 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 5 ms 5076 KB Output is correct
30 Correct 79 ms 5204 KB Output is correct
31 Correct 70 ms 5220 KB Output is correct
32 Correct 57 ms 5216 KB Output is correct
33 Correct 29 ms 5076 KB Output is correct
34 Correct 74 ms 5232 KB Output is correct
35 Correct 91 ms 5216 KB Output is correct
36 Correct 56 ms 5332 KB Output is correct
37 Correct 119 ms 5204 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 73 ms 5232 KB Output is correct
40 Correct 56 ms 5240 KB Output is correct
41 Correct 54 ms 5200 KB Output is correct
42 Correct 48 ms 5204 KB Output is correct
43 Correct 62 ms 5184 KB Output is correct
44 Correct 60 ms 5204 KB Output is correct
45 Correct 77 ms 5228 KB Output is correct
46 Correct 82 ms 5216 KB Output is correct
47 Correct 54 ms 5188 KB Output is correct
48 Correct 57 ms 5192 KB Output is correct
49 Correct 65 ms 5212 KB Output is correct
50 Correct 67 ms 5204 KB Output is correct
51 Correct 53 ms 5204 KB Output is correct
52 Correct 66 ms 5204 KB Output is correct
53 Correct 69 ms 5216 KB Output is correct
54 Correct 79 ms 5220 KB Output is correct
55 Execution timed out 2072 ms 19136 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Correct 3 ms 4984 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4984 KB Output is correct
6 Correct 3 ms 4996 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 4948 KB Output is correct
9 Correct 4 ms 4948 KB Output is correct
10 Correct 4 ms 4948 KB Output is correct
11 Correct 4 ms 5024 KB Output is correct
12 Correct 4 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 4 ms 5048 KB Output is correct
16 Correct 3 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 4 ms 5064 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 4976 KB Output is correct
22 Correct 3 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 4 ms 4948 KB Output is correct
26 Correct 4 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 5 ms 5076 KB Output is correct
30 Correct 79 ms 5204 KB Output is correct
31 Correct 70 ms 5220 KB Output is correct
32 Correct 57 ms 5216 KB Output is correct
33 Correct 29 ms 5076 KB Output is correct
34 Correct 74 ms 5232 KB Output is correct
35 Correct 91 ms 5216 KB Output is correct
36 Correct 56 ms 5332 KB Output is correct
37 Correct 119 ms 5204 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 73 ms 5232 KB Output is correct
40 Correct 56 ms 5240 KB Output is correct
41 Correct 54 ms 5200 KB Output is correct
42 Correct 48 ms 5204 KB Output is correct
43 Correct 62 ms 5184 KB Output is correct
44 Correct 60 ms 5204 KB Output is correct
45 Correct 77 ms 5228 KB Output is correct
46 Correct 82 ms 5216 KB Output is correct
47 Correct 54 ms 5188 KB Output is correct
48 Correct 57 ms 5192 KB Output is correct
49 Correct 65 ms 5212 KB Output is correct
50 Correct 67 ms 5204 KB Output is correct
51 Correct 53 ms 5204 KB Output is correct
52 Correct 66 ms 5204 KB Output is correct
53 Correct 69 ms 5216 KB Output is correct
54 Correct 79 ms 5220 KB Output is correct
55 Correct 346 ms 25984 KB Output is correct
56 Correct 135 ms 19028 KB Output is correct
57 Correct 190 ms 22320 KB Output is correct
58 Correct 245 ms 20136 KB Output is correct
59 Correct 279 ms 19236 KB Output is correct
60 Correct 205 ms 20692 KB Output is correct
61 Correct 261 ms 20996 KB Output is correct
62 Correct 431 ms 20844 KB Output is correct
63 Correct 248 ms 19012 KB Output is correct
64 Correct 307 ms 20620 KB Output is correct
65 Correct 168 ms 18408 KB Output is correct
66 Correct 195 ms 20456 KB Output is correct
67 Correct 360 ms 20112 KB Output is correct
68 Correct 453 ms 20892 KB Output is correct
69 Execution timed out 2073 ms 35576 KB Time limit exceeded
70 Halted 0 ms 0 KB -