oj.uz

Submission #649845

# Submission time Handle Problem Language Result Execution time Memory
649845 2022-10-11T12:03:22 Z welleyth Joker (BOI20_joker) C++17
39 / 100
 2000 ms 36468 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);
    }
    vector<int> order(n);
    iota(order.begin(),order.end(),1);
    shuffle(order.begin(),order.end(),rnd);
    for(auto& j : order){
        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:107:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  107 |         if(Queries[i].size() < __lg(m+1)){
      |            ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 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 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 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 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 5 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 5 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 5064 KB Output is correct
21 Correct 5 ms 5064 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 5 ms 4948 KB Output is correct
26 Correct 3 ms 5056 KB Output is correct
27 Correct 4 ms 5028 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 4 ms 4948 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 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 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 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 5 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 5 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 5064 KB Output is correct
21 Correct 5 ms 5064 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 5 ms 4948 KB Output is correct
26 Correct 3 ms 5056 KB Output is correct
27 Correct 4 ms 5028 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 3 ms 5076 KB Output is correct
30 Correct 152 ms 5204 KB Output is correct
31 Correct 127 ms 5224 KB Output is correct
32 Correct 90 ms 5200 KB Output is correct
33 Correct 66 ms 5180 KB Output is correct
34 Correct 142 ms 5256 KB Output is correct
35 Correct 152 ms 5224 KB Output is correct
36 Correct 92 ms 5344 KB Output is correct
37 Correct 186 ms 5292 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 136 ms 5232 KB Output is correct
40 Correct 81 ms 5212 KB Output is correct
41 Correct 91 ms 5332 KB Output is correct
42 Correct 86 ms 5204 KB Output is correct
43 Correct 85 ms 5204 KB Output is correct
44 Correct 83 ms 5204 KB Output is correct
45 Correct 126 ms 5212 KB Output is correct
46 Correct 138 ms 5236 KB Output is correct
47 Correct 86 ms 5192 KB Output is correct
48 Correct 93 ms 5204 KB Output is correct
49 Correct 118 ms 5216 KB Output is correct
50 Correct 142 ms 5204 KB Output is correct
51 Correct 78 ms 5204 KB Output is correct
52 Correct 90 ms 5204 KB Output is correct
53 Correct 115 ms 5224 KB Output is correct
54 Correct 152 ms 5220 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 313 ms 30980 KB Output is correct
4 Correct 134 ms 19848 KB Output is correct
5 Correct 263 ms 22344 KB Output is correct
6 Correct 246 ms 20404 KB Output is correct
7 Correct 307 ms 19136 KB Output is correct
8 Correct 208 ms 20776 KB Output is correct
9 Correct 329 ms 21196 KB Output is correct
10 Correct 484 ms 21116 KB Output is correct
11 Correct 268 ms 19220 KB Output is correct
12 Correct 438 ms 20536 KB Output is correct
13 Correct 169 ms 18480 KB Output is correct
14 Correct 226 ms 20604 KB Output is correct
15 Correct 387 ms 20672 KB Output is correct
16 Correct 557 ms 20932 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 4 ms 4948 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 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 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 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 5 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 5 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 5064 KB Output is correct
21 Correct 5 ms 5064 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 5 ms 4948 KB Output is correct
26 Correct 3 ms 5056 KB Output is correct
27 Correct 4 ms 5028 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 313 ms 30980 KB Output is correct
30 Correct 134 ms 19848 KB Output is correct
31 Correct 263 ms 22344 KB Output is correct
32 Correct 246 ms 20404 KB Output is correct
33 Correct 307 ms 19136 KB Output is correct
34 Correct 208 ms 20776 KB Output is correct
35 Correct 329 ms 21196 KB Output is correct
36 Correct 484 ms 21116 KB Output is correct
37 Correct 268 ms 19220 KB Output is correct
38 Correct 438 ms 20536 KB Output is correct
39 Correct 169 ms 18480 KB Output is correct
40 Correct 226 ms 20604 KB Output is correct
41 Correct 387 ms 20672 KB Output is correct
42 Correct 557 ms 20932 KB Output is correct
43 Execution timed out 2059 ms 36468 KB Time limit exceeded
44 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 4 ms 4948 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 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 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 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 5 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 5 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 5064 KB Output is correct
21 Correct 5 ms 5064 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 5 ms 4948 KB Output is correct
26 Correct 3 ms 5056 KB Output is correct
27 Correct 4 ms 5028 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 3 ms 5076 KB Output is correct
30 Correct 152 ms 5204 KB Output is correct
31 Correct 127 ms 5224 KB Output is correct
32 Correct 90 ms 5200 KB Output is correct
33 Correct 66 ms 5180 KB Output is correct
34 Correct 142 ms 5256 KB Output is correct
35 Correct 152 ms 5224 KB Output is correct
36 Correct 92 ms 5344 KB Output is correct
37 Correct 186 ms 5292 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 136 ms 5232 KB Output is correct
40 Correct 81 ms 5212 KB Output is correct
41 Correct 91 ms 5332 KB Output is correct
42 Correct 86 ms 5204 KB Output is correct
43 Correct 85 ms 5204 KB Output is correct
44 Correct 83 ms 5204 KB Output is correct
45 Correct 126 ms 5212 KB Output is correct
46 Correct 138 ms 5236 KB Output is correct
47 Correct 86 ms 5192 KB Output is correct
48 Correct 93 ms 5204 KB Output is correct
49 Correct 118 ms 5216 KB Output is correct
50 Correct 142 ms 5204 KB Output is correct
51 Correct 78 ms 5204 KB Output is correct
52 Correct 90 ms 5204 KB Output is correct
53 Correct 115 ms 5224 KB Output is correct
54 Correct 152 ms 5220 KB Output is correct
55 Execution timed out 2095 ms 22444 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 4 ms 4948 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 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 2 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 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 5 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 5 ms 4948 KB Output is correct
16 Correct 4 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 5064 KB Output is correct
21 Correct 5 ms 5064 KB Output is correct
22 Correct 4 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 4 ms 4948 KB Output is correct
25 Correct 5 ms 4948 KB Output is correct
26 Correct 3 ms 5056 KB Output is correct
27 Correct 4 ms 5028 KB Output is correct
28 Correct 4 ms 4948 KB Output is correct
29 Correct 3 ms 5076 KB Output is correct
30 Correct 152 ms 5204 KB Output is correct
31 Correct 127 ms 5224 KB Output is correct
32 Correct 90 ms 5200 KB Output is correct
33 Correct 66 ms 5180 KB Output is correct
34 Correct 142 ms 5256 KB Output is correct
35 Correct 152 ms 5224 KB Output is correct
36 Correct 92 ms 5344 KB Output is correct
37 Correct 186 ms 5292 KB Output is correct
38 Correct 3 ms 5076 KB Output is correct
39 Correct 136 ms 5232 KB Output is correct
40 Correct 81 ms 5212 KB Output is correct
41 Correct 91 ms 5332 KB Output is correct
42 Correct 86 ms 5204 KB Output is correct
43 Correct 85 ms 5204 KB Output is correct
44 Correct 83 ms 5204 KB Output is correct
45 Correct 126 ms 5212 KB Output is correct
46 Correct 138 ms 5236 KB Output is correct
47 Correct 86 ms 5192 KB Output is correct
48 Correct 93 ms 5204 KB Output is correct
49 Correct 118 ms 5216 KB Output is correct
50 Correct 142 ms 5204 KB Output is correct
51 Correct 78 ms 5204 KB Output is correct
52 Correct 90 ms 5204 KB Output is correct
53 Correct 115 ms 5224 KB Output is correct
54 Correct 152 ms 5220 KB Output is correct
55 Correct 313 ms 30980 KB Output is correct
56 Correct 134 ms 19848 KB Output is correct
57 Correct 263 ms 22344 KB Output is correct
58 Correct 246 ms 20404 KB Output is correct
59 Correct 307 ms 19136 KB Output is correct
60 Correct 208 ms 20776 KB Output is correct
61 Correct 329 ms 21196 KB Output is correct
62 Correct 484 ms 21116 KB Output is correct
63 Correct 268 ms 19220 KB Output is correct
64 Correct 438 ms 20536 KB Output is correct
65 Correct 169 ms 18480 KB Output is correct
66 Correct 226 ms 20604 KB Output is correct
67 Correct 387 ms 20672 KB Output is correct
68 Correct 557 ms 20932 KB Output is correct
69 Execution timed out 2059 ms 36468 KB Time limit exceeded
70 Halted 0 ms 0 KB -