oj.uz

Submission #648641

# Submission time Handle Problem Language Result Execution time Memory
648641 2022-10-07T08:48:19 Z mychecksedad Joker (BOI20_joker) C++17
39 / 100
 2000 ms 60816 KB 
/* Author : Mychecksdead */
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef long double ld;
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define PI 3.1415926535
#define pb push_back
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
#define oset tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
#define debug(x) cerr << #x << " is " << x << '\n';
const int N = 1e6+100, M = 2e5+10, F = 2147483646, K = 20;

struct Dsu {
    vector<int> s;
    vector<pair<int, int>> p;
    vector<bool> bp;
    Dsu(int n){
        s.resize(n+1, 1);
        p.resize(n+1);
        bp.resize(n+1);
        for(int i = 0; i <= n; ++i) p[i] = {i, 0}, bp[i] = 1;
    }
    pair<int, int> find_set(int v) {
        if (v != p[v].first) {
            int parity = p[v].second;
            p[v] = find_set(p[v].first);
            p[v].second ^= parity;
        }
        return p[v];
    }
    void merge(int a, int b){
        pair<int, int> pa = find_set(a);
        a = pa.first;
        int x = pa.second;

        pair<int, int> pb = find_set(b);
        b = pb.first;
        int y = pb.second;

        if (a == b) {
            if (x == y)
                bp[a] = 0;
        } else {
            if (s[a] < s[b])
                swap(a, b);
            p[b] = make_pair(a, x^y^1);
            bp[a] = bp[b] & bp[a];
            s[a] += s[b];
        }
    }
};


int n, m, q, l, r;
bool ok;
vector<pair<int, int>> g[N], edges;
bitset<M> vis, pos;
void dfs(int v, int p, bool c){
    vis[v] = 1;
    pos[v] = c;
    for(auto k: g[v]){
        int u = k.first;
        if(l <= k.second && k.second <= r) continue;
        if(u != p){
            if(vis[u])
                ok |= pos[v] == pos[u];
            else
                dfs(u, v, !c);
        }
    }
}
void solve(){
    cin >> n >> m >> q;
    for(int i = 0; i < m; ++i){
        int u, v; cin >> u >> v;
        g[u].pb({v, i + 1});
        g[v].pb({u, i + 1});
        edges.pb({u, v});
    }
    if(n <= 2000 && q <= 2000){
        for(int i = 0; i < q; ++i){
            cin >> l >> r;
            vis = 0;
            ok = 0;
            for(int v = 1; v <= n; ++v) if(!ok && !vis[v]) dfs(v, v, 0);
            if(ok) cout << "YES\n";
            else cout << "NO\n";
        }
    }
    else{
        vector<pair<int, int>> queries[205];
        vector<int> qq(q + 1);
        for(int i = 1; i <= q; ++i){
            cin >> l >> r;
            queries[l].pb({r, i});
        }
        for(int i = 1; i <= 200; ++i){
            if(queries[i].empty()) continue;
            Dsu d(n);
            ok = 0;
            for(int j = 1; j < i; ++j){
                int u = edges[j - 1].first, v = edges[j - 1].second;
                d.merge(u, v);
                ok |= !d.bp[d.find_set(u).first] | !d.bp[d.find_set(v).first];
            }
            sort(all(queries[i]), [&](const pair<int, int> &a, const pair<int, int> &b){
                return a.first > b.first;
            });
            int cur = m;
            for(auto k: queries[i]){
                while(cur > k.first){
                    int u = edges[cur - 1].first, v = edges[cur - 1].second;
                    d.merge(u, v);
                    ok |= !d.bp[d.find_set(u).first] | !d.bp[d.find_set(v).first];
                    cur--;
                }
                qq[k.second] = ok;
            }
        }
        for(int i = 1; i <= q; ++i) cout << (qq[i] ? "YES\n" : "NO\n");
    }
}



int main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int T = 1, aa;
    // cin >> T;aa=T;
    while(T--){
        // cout << "Case #" << aa-T << ": ";
        solve();
        cout << '\n';
    }
    return 0;
 
}

Compilation message

Joker.cpp: In function 'int main()':
Joker.cpp:133:16: warning: unused variable 'aa' [-Wunused-variable]
  133 |     int T = 1, aa;
      |                ^~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 13 ms 23740 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23868 KB Output is correct
9 Correct 14 ms 23820 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 13 ms 23872 KB Output is correct
13 Correct 13 ms 23864 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23776 KB Output is correct
17 Correct 13 ms 23868 KB Output is correct
18 Correct 14 ms 23768 KB Output is correct
19 Correct 13 ms 23892 KB Output is correct
20 Correct 13 ms 23776 KB Output is correct
21 Correct 13 ms 23932 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 13 ms 23872 KB Output is correct
24 Correct 14 ms 23860 KB Output is correct
25 Correct 13 ms 23764 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23764 KB Output is correct
28 Correct 13 ms 23876 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 13 ms 23740 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23868 KB Output is correct
9 Correct 14 ms 23820 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 13 ms 23872 KB Output is correct
13 Correct 13 ms 23864 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23776 KB Output is correct
17 Correct 13 ms 23868 KB Output is correct
18 Correct 14 ms 23768 KB Output is correct
19 Correct 13 ms 23892 KB Output is correct
20 Correct 13 ms 23776 KB Output is correct
21 Correct 13 ms 23932 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 13 ms 23872 KB Output is correct
24 Correct 14 ms 23860 KB Output is correct
25 Correct 13 ms 23764 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23764 KB Output is correct
28 Correct 13 ms 23876 KB Output is correct
29 Correct 84 ms 23888 KB Output is correct
30 Correct 96 ms 23892 KB Output is correct
31 Correct 110 ms 23980 KB Output is correct
32 Correct 92 ms 24000 KB Output is correct
33 Correct 73 ms 23964 KB Output is correct
34 Correct 95 ms 23900 KB Output is correct
35 Correct 121 ms 23972 KB Output is correct
36 Correct 45 ms 24020 KB Output is correct
37 Correct 87 ms 23972 KB Output is correct
38 Correct 92 ms 23964 KB Output is correct
39 Correct 89 ms 23976 KB Output is correct
40 Correct 84 ms 23988 KB Output is correct
41 Correct 88 ms 23996 KB Output is correct
42 Correct 86 ms 23892 KB Output is correct
43 Correct 81 ms 23968 KB Output is correct
44 Correct 102 ms 23892 KB Output is correct
45 Correct 115 ms 23892 KB Output is correct
46 Correct 114 ms 23972 KB Output is correct
47 Correct 83 ms 23972 KB Output is correct
48 Correct 92 ms 23964 KB Output is correct
49 Correct 99 ms 23868 KB Output is correct
50 Correct 95 ms 23948 KB Output is correct
51 Correct 80 ms 23968 KB Output is correct
52 Correct 94 ms 23972 KB Output is correct
53 Correct 105 ms 23984 KB Output is correct
54 Correct 109 ms 23972 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 114 ms 34428 KB Output is correct
4 Correct 144 ms 37552 KB Output is correct
5 Correct 148 ms 37504 KB Output is correct
6 Correct 124 ms 36280 KB Output is correct
7 Correct 129 ms 36304 KB Output is correct
8 Correct 119 ms 35384 KB Output is correct
9 Correct 134 ms 36328 KB Output is correct
10 Correct 158 ms 37484 KB Output is correct
11 Correct 136 ms 36036 KB Output is correct
12 Correct 157 ms 36892 KB Output is correct
13 Correct 116 ms 35032 KB Output is correct
14 Correct 127 ms 35240 KB Output is correct
15 Correct 152 ms 36356 KB Output is correct
16 Correct 168 ms 37448 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 13 ms 23740 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23868 KB Output is correct
9 Correct 14 ms 23820 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 13 ms 23872 KB Output is correct
13 Correct 13 ms 23864 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23776 KB Output is correct
17 Correct 13 ms 23868 KB Output is correct
18 Correct 14 ms 23768 KB Output is correct
19 Correct 13 ms 23892 KB Output is correct
20 Correct 13 ms 23776 KB Output is correct
21 Correct 13 ms 23932 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 13 ms 23872 KB Output is correct
24 Correct 14 ms 23860 KB Output is correct
25 Correct 13 ms 23764 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23764 KB Output is correct
28 Correct 13 ms 23876 KB Output is correct
29 Correct 114 ms 34428 KB Output is correct
30 Correct 144 ms 37552 KB Output is correct
31 Correct 148 ms 37504 KB Output is correct
32 Correct 124 ms 36280 KB Output is correct
33 Correct 129 ms 36304 KB Output is correct
34 Correct 119 ms 35384 KB Output is correct
35 Correct 134 ms 36328 KB Output is correct
36 Correct 158 ms 37484 KB Output is correct
37 Correct 136 ms 36036 KB Output is correct
38 Correct 157 ms 36892 KB Output is correct
39 Correct 116 ms 35032 KB Output is correct
40 Correct 127 ms 35240 KB Output is correct
41 Correct 152 ms 36356 KB Output is correct
42 Correct 168 ms 37448 KB Output is correct
43 Correct 1361 ms 35188 KB Output is correct
44 Correct 1672 ms 38836 KB Output is correct
45 Correct 1661 ms 38760 KB Output is correct
46 Correct 1620 ms 36776 KB Output is correct
47 Correct 1912 ms 36788 KB Output is correct
48 Correct 1757 ms 36908 KB Output is correct
49 Execution timed out 2048 ms 38296 KB Time limit exceeded
50 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 13 ms 23740 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23868 KB Output is correct
9 Correct 14 ms 23820 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 13 ms 23872 KB Output is correct
13 Correct 13 ms 23864 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23776 KB Output is correct
17 Correct 13 ms 23868 KB Output is correct
18 Correct 14 ms 23768 KB Output is correct
19 Correct 13 ms 23892 KB Output is correct
20 Correct 13 ms 23776 KB Output is correct
21 Correct 13 ms 23932 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 13 ms 23872 KB Output is correct
24 Correct 14 ms 23860 KB Output is correct
25 Correct 13 ms 23764 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23764 KB Output is correct
28 Correct 13 ms 23876 KB Output is correct
29 Correct 84 ms 23888 KB Output is correct
30 Correct 96 ms 23892 KB Output is correct
31 Correct 110 ms 23980 KB Output is correct
32 Correct 92 ms 24000 KB Output is correct
33 Correct 73 ms 23964 KB Output is correct
34 Correct 95 ms 23900 KB Output is correct
35 Correct 121 ms 23972 KB Output is correct
36 Correct 45 ms 24020 KB Output is correct
37 Correct 87 ms 23972 KB Output is correct
38 Correct 92 ms 23964 KB Output is correct
39 Correct 89 ms 23976 KB Output is correct
40 Correct 84 ms 23988 KB Output is correct
41 Correct 88 ms 23996 KB Output is correct
42 Correct 86 ms 23892 KB Output is correct
43 Correct 81 ms 23968 KB Output is correct
44 Correct 102 ms 23892 KB Output is correct
45 Correct 115 ms 23892 KB Output is correct
46 Correct 114 ms 23972 KB Output is correct
47 Correct 83 ms 23972 KB Output is correct
48 Correct 92 ms 23964 KB Output is correct
49 Correct 99 ms 23868 KB Output is correct
50 Correct 95 ms 23948 KB Output is correct
51 Correct 80 ms 23968 KB Output is correct
52 Correct 94 ms 23972 KB Output is correct
53 Correct 105 ms 23984 KB Output is correct
54 Correct 109 ms 23972 KB Output is correct
55 Runtime error 92 ms 60816 KB Execution killed with signal 11
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 13 ms 23740 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23868 KB Output is correct
9 Correct 14 ms 23820 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 13 ms 23872 KB Output is correct
13 Correct 13 ms 23864 KB Output is correct
14 Correct 13 ms 23792 KB Output is correct
15 Correct 14 ms 23792 KB Output is correct
16 Correct 13 ms 23776 KB Output is correct
17 Correct 13 ms 23868 KB Output is correct
18 Correct 14 ms 23768 KB Output is correct
19 Correct 13 ms 23892 KB Output is correct
20 Correct 13 ms 23776 KB Output is correct
21 Correct 13 ms 23932 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 13 ms 23872 KB Output is correct
24 Correct 14 ms 23860 KB Output is correct
25 Correct 13 ms 23764 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23764 KB Output is correct
28 Correct 13 ms 23876 KB Output is correct
29 Correct 84 ms 23888 KB Output is correct
30 Correct 96 ms 23892 KB Output is correct
31 Correct 110 ms 23980 KB Output is correct
32 Correct 92 ms 24000 KB Output is correct
33 Correct 73 ms 23964 KB Output is correct
34 Correct 95 ms 23900 KB Output is correct
35 Correct 121 ms 23972 KB Output is correct
36 Correct 45 ms 24020 KB Output is correct
37 Correct 87 ms 23972 KB Output is correct
38 Correct 92 ms 23964 KB Output is correct
39 Correct 89 ms 23976 KB Output is correct
40 Correct 84 ms 23988 KB Output is correct
41 Correct 88 ms 23996 KB Output is correct
42 Correct 86 ms 23892 KB Output is correct
43 Correct 81 ms 23968 KB Output is correct
44 Correct 102 ms 23892 KB Output is correct
45 Correct 115 ms 23892 KB Output is correct
46 Correct 114 ms 23972 KB Output is correct
47 Correct 83 ms 23972 KB Output is correct
48 Correct 92 ms 23964 KB Output is correct
49 Correct 99 ms 23868 KB Output is correct
50 Correct 95 ms 23948 KB Output is correct
51 Correct 80 ms 23968 KB Output is correct
52 Correct 94 ms 23972 KB Output is correct
53 Correct 105 ms 23984 KB Output is correct
54 Correct 109 ms 23972 KB Output is correct
55 Correct 114 ms 34428 KB Output is correct
56 Correct 144 ms 37552 KB Output is correct
57 Correct 148 ms 37504 KB Output is correct
58 Correct 124 ms 36280 KB Output is correct
59 Correct 129 ms 36304 KB Output is correct
60 Correct 119 ms 35384 KB Output is correct
61 Correct 134 ms 36328 KB Output is correct
62 Correct 158 ms 37484 KB Output is correct
63 Correct 136 ms 36036 KB Output is correct
64 Correct 157 ms 36892 KB Output is correct
65 Correct 116 ms 35032 KB Output is correct
66 Correct 127 ms 35240 KB Output is correct
67 Correct 152 ms 36356 KB Output is correct
68 Correct 168 ms 37448 KB Output is correct
69 Correct 1361 ms 35188 KB Output is correct
70 Correct 1672 ms 38836 KB Output is correct
71 Correct 1661 ms 38760 KB Output is correct
72 Correct 1620 ms 36776 KB Output is correct
73 Correct 1912 ms 36788 KB Output is correct
74 Correct 1757 ms 36908 KB Output is correct
75 Execution timed out 2048 ms 38296 KB Time limit exceeded
76 Halted 0 ms 0 KB -