oj.uz

Submission #800337

# Submission time Handle Problem Language Result Execution time Memory
800337 2023-08-01T13:28:50 Z TB_ Joker (BOI20_joker) C++17
49 / 100
 2000 ms 24256 KB 
#include <bits/stdc++.h>
using namespace std;

#undef _GLIBCXX_DEBUG                // disable run-time bound checking, etc
#pragma GCC optimize("Ofast,inline") // Ofast = O3,fast-math,allow-store-data-races,no-protect-parens
#pragma GCC optimize ("unroll-loops")

// #pragma GCC target("bmi,bmi2,lzcnt,popcnt")                      // bit manipulation
// #pragma GCC target("movbe")                                      // byte swap
// #pragma GCC target("aes,pclmul,rdrnd")                           // encryption
// #pragma GCC target("avx,avx2,f16c,fma,sse3,ssse3,sse4.1,sse4.2") // SIMD

// #include <bits/extc++.h>
// using namespace __gnu_pbds;
// template<class T>using ordered_set = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
// template<class T>using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define ll long long
#define INF (ll)1e9+7
#define fo(i, n) for(int i=0;i<((ll)n);i++)
#define deb(x) cout << #x << " = " << x << endl;
#define deb2(x, y) cout << #x << " = " << x << ", " << #y << " = " << y << endl
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define LSOne(S) ((S) & (-S))
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
inline int readint(){ int v = 0; char c; while((c = getchar()) != EOF && c != ' ' && c != '\n'){ v *= 10; v += c - '0'; } return v; }
inline int readintsigned() { int v = 0; int sign = 1; char c = getchar(); if (c == '-') { sign = -1; } else { v += c - '0'; } while ((c = getchar()) != EOF && c != ' ' && c != '\n') { v *= 10; v += c - '0'; } return v * sign; }
inline string readstring() { string s; char c; while ((c = getchar()) != EOF && c != '\n' && c != ' ') { s.push_back(c); } return s; }
template <class result_t=std::chrono::milliseconds,class clock_t=std::chrono::steady_clock,class duration_t = std::chrono::milliseconds>
auto since(std::chrono::time_point<clock_t, duration_t> const& start){return std::chrono::duration_cast<result_t>(clock_t::now() - start);}
typedef pair<int, int> pii;
typedef pair<ll, ll> pl;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vpii;
typedef vector<pl> vpl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef vector<vpii> vvpii;
typedef vector<vpl> vvpl;



struct UnionFind{
    vl degree, height, p, siz, extraHeight;
    vector<pair<pii, pii>> updates; // pUpdates, sizUpdate
    vi possibleUpdate, extraHeightUpdate;
    int n;
    int possible = 0;
    UnionFind(int n) : n(n) {
        height.assign(n, 0);
        extraHeight.assign(n, 0);
        degree.assign(n, 0); 
        p.assign(n, 0); 
        siz.assign(n, 1); 
        fo(i, n) p[i] = i;
    }

    int find(int x){
        if(x == p[x]) return x;
        int res = find(p[x]);
        height[x] = height[p[x]]+1+extraHeight[x];
        return res;
    }


    void addEdge(int a, int b){
        possibleUpdate.pb(possible);
        extraHeightUpdate.pb(-1);
        updates.pb({{-1, -1}, {-1, -1}});
        int a2 = find(a);
        int b2 = find(b);
        if(a2==b2){
            if(height[a]%2 == height[b]%2) possible++;
        }else{
            if(siz[b2] > siz[a2]) {
                swap(a2, b2);
                swap(a, b);
            }
            updates[updates.size()-1] = {{b2, p[b2]}, {a2, siz[a2]}};
            siz[a2] += siz[b2];
            p[b2] = a2;
            if((height[b2]%2 == height[b]%2)^(height[a2]%2 == height[a]%2)){
                extraHeight[b2]++;
                extraHeightUpdate[extraHeightUpdate.size()-1] = b2;
            }
        }
    }  


    void rollback(){
        possible = possibleUpdate[possibleUpdate.size()-1];
        int heightupdate = extraHeightUpdate[extraHeightUpdate.size()-1];
        if(heightupdate != -1) extraHeight[heightupdate]--;
        pair<pl, pl> up = updates[updates.size()-1];
        if(up.F.F != -1){
            p[up.F.F] = up.F.S;
            siz[up.S.F] = up.S.S;

        }
        updates.pop_back();
        possibleUpdate.pop_back();
        extraHeightUpdate.pop_back();
    }  
};


int main() {
    // cout << fixed << setprecision(20);
    // auto start = std::chrono::steady_clock::now(); // since(start).count()
    cin.tie(0)->sync_with_stdio(0);

    int n, m, q, from, to, que;
    vpl edges;
    cin >> n >> m >> q;
    fo(i, m){
        cin >> from >> to;
        edges.pb({from-1, to-1});
    }

    vector<vector<tuple<int, int, int>>> queries(1000);
    int sqN = sqrt(200000);
    fo(x, q){
        cin >> from >> to;
        queries[from/sqN].pb({to-1, from-1, x});
    }
    fo(i, 1000){
        sort(rall(queries[i]));
    }
    UnionFind uf(n);
    vi ans(q, 0);
    int lo = 0;
    fo(section, 1000){
        int hi = m-1;
        if(!queries[section].size()) continue;
        fo(i, sqN*section-lo) 
            uf.addEdge(edges[lo+i].F, edges[lo+i].S);
        lo = sqN*section;
        for(auto query : queries[section]){
            tie(to, from, que) = query;
            fo(i, hi-to) uf.addEdge(edges[hi-i].F,edges[hi-i].S);
            hi=to;

            fo(i, from-lo) 
                uf.addEdge(edges[lo+i].F, edges[lo+i].S);
            if(uf.possible) ans[que] = 1;
            fo(i, from-sqN*section)
                uf.rollback();
            lo = sqN*section;
        }
        while(uf.possibleUpdate.size()-lo)
            uf.rollback();
    }
    fo(i, q) cout << (ans[i]?"YES\n":"NO\n");


    return 0;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 360 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 288 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 360 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 288 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 7 ms 468 KB Output is correct
30 Correct 9 ms 584 KB Output is correct
31 Correct 8 ms 556 KB Output is correct
32 Correct 12 ms 468 KB Output is correct
33 Correct 7 ms 468 KB Output is correct
34 Correct 9 ms 532 KB Output is correct
35 Correct 9 ms 576 KB Output is correct
36 Correct 6 ms 468 KB Output is correct
37 Correct 7 ms 468 KB Output is correct
38 Correct 7 ms 580 KB Output is correct
39 Correct 7 ms 468 KB Output is correct
40 Correct 7 ms 468 KB Output is correct
41 Correct 8 ms 468 KB Output is correct
42 Correct 7 ms 504 KB Output is correct
43 Correct 7 ms 412 KB Output is correct
44 Correct 7 ms 468 KB Output is correct
45 Correct 8 ms 556 KB Output is correct
46 Correct 14 ms 572 KB Output is correct
47 Correct 6 ms 468 KB Output is correct
48 Correct 7 ms 536 KB Output is correct
49 Correct 7 ms 468 KB Output is correct
50 Correct 11 ms 576 KB Output is correct
51 Correct 7 ms 520 KB Output is correct
52 Correct 7 ms 468 KB Output is correct
53 Correct 8 ms 468 KB Output is correct
54 Correct 13 ms 572 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 73 ms 20136 KB Output is correct
4 Correct 87 ms 23996 KB Output is correct
5 Correct 99 ms 23236 KB Output is correct
6 Correct 92 ms 20084 KB Output is correct
7 Correct 86 ms 20088 KB Output is correct
8 Correct 85 ms 18756 KB Output is correct
9 Correct 82 ms 20344 KB Output is correct
10 Correct 88 ms 24200 KB Output is correct
11 Correct 84 ms 20084 KB Output is correct
12 Correct 107 ms 23268 KB Output is correct
13 Correct 85 ms 17032 KB Output is correct
14 Correct 87 ms 18600 KB Output is correct
15 Correct 86 ms 21676 KB Output is correct
16 Correct 91 ms 24016 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 360 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 288 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 73 ms 20136 KB Output is correct
30 Correct 87 ms 23996 KB Output is correct
31 Correct 99 ms 23236 KB Output is correct
32 Correct 92 ms 20084 KB Output is correct
33 Correct 86 ms 20088 KB Output is correct
34 Correct 85 ms 18756 KB Output is correct
35 Correct 82 ms 20344 KB Output is correct
36 Correct 88 ms 24200 KB Output is correct
37 Correct 84 ms 20084 KB Output is correct
38 Correct 107 ms 23268 KB Output is correct
39 Correct 85 ms 17032 KB Output is correct
40 Correct 87 ms 18600 KB Output is correct
41 Correct 86 ms 21676 KB Output is correct
42 Correct 91 ms 24016 KB Output is correct
43 Correct 326 ms 20168 KB Output is correct
44 Correct 358 ms 24000 KB Output is correct
45 Correct 371 ms 24092 KB Output is correct
46 Correct 386 ms 20228 KB Output is correct
47 Correct 460 ms 20128 KB Output is correct
48 Correct 566 ms 20340 KB Output is correct
49 Correct 563 ms 24256 KB Output is correct
50 Correct 386 ms 19388 KB Output is correct
51 Correct 404 ms 21744 KB Output is correct
52 Correct 429 ms 24096 KB Output is correct
53 Correct 470 ms 17076 KB Output is correct
54 Correct 512 ms 19428 KB Output is correct
55 Correct 517 ms 21684 KB Output is correct
56 Correct 524 ms 24056 KB Output is correct

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 360 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 288 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 7 ms 468 KB Output is correct
30 Correct 9 ms 584 KB Output is correct
31 Correct 8 ms 556 KB Output is correct
32 Correct 12 ms 468 KB Output is correct
33 Correct 7 ms 468 KB Output is correct
34 Correct 9 ms 532 KB Output is correct
35 Correct 9 ms 576 KB Output is correct
36 Correct 6 ms 468 KB Output is correct
37 Correct 7 ms 468 KB Output is correct
38 Correct 7 ms 580 KB Output is correct
39 Correct 7 ms 468 KB Output is correct
40 Correct 7 ms 468 KB Output is correct
41 Correct 8 ms 468 KB Output is correct
42 Correct 7 ms 504 KB Output is correct
43 Correct 7 ms 412 KB Output is correct
44 Correct 7 ms 468 KB Output is correct
45 Correct 8 ms 556 KB Output is correct
46 Correct 14 ms 572 KB Output is correct
47 Correct 6 ms 468 KB Output is correct
48 Correct 7 ms 536 KB Output is correct
49 Correct 7 ms 468 KB Output is correct
50 Correct 11 ms 576 KB Output is correct
51 Correct 7 ms 520 KB Output is correct
52 Correct 7 ms 468 KB Output is correct
53 Correct 8 ms 468 KB Output is correct
54 Correct 13 ms 572 KB Output is correct
55 Correct 507 ms 16428 KB Output is correct
56 Correct 1639 ms 20552 KB Output is correct
57 Correct 896 ms 19620 KB Output is correct
58 Correct 1035 ms 16620 KB Output is correct
59 Execution timed out 2059 ms 16568 KB Time limit exceeded
60 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 360 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 288 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 7 ms 468 KB Output is correct
30 Correct 9 ms 584 KB Output is correct
31 Correct 8 ms 556 KB Output is correct
32 Correct 12 ms 468 KB Output is correct
33 Correct 7 ms 468 KB Output is correct
34 Correct 9 ms 532 KB Output is correct
35 Correct 9 ms 576 KB Output is correct
36 Correct 6 ms 468 KB Output is correct
37 Correct 7 ms 468 KB Output is correct
38 Correct 7 ms 580 KB Output is correct
39 Correct 7 ms 468 KB Output is correct
40 Correct 7 ms 468 KB Output is correct
41 Correct 8 ms 468 KB Output is correct
42 Correct 7 ms 504 KB Output is correct
43 Correct 7 ms 412 KB Output is correct
44 Correct 7 ms 468 KB Output is correct
45 Correct 8 ms 556 KB Output is correct
46 Correct 14 ms 572 KB Output is correct
47 Correct 6 ms 468 KB Output is correct
48 Correct 7 ms 536 KB Output is correct
49 Correct 7 ms 468 KB Output is correct
50 Correct 11 ms 576 KB Output is correct
51 Correct 7 ms 520 KB Output is correct
52 Correct 7 ms 468 KB Output is correct
53 Correct 8 ms 468 KB Output is correct
54 Correct 13 ms 572 KB Output is correct
55 Correct 73 ms 20136 KB Output is correct
56 Correct 87 ms 23996 KB Output is correct
57 Correct 99 ms 23236 KB Output is correct
58 Correct 92 ms 20084 KB Output is correct
59 Correct 86 ms 20088 KB Output is correct
60 Correct 85 ms 18756 KB Output is correct
61 Correct 82 ms 20344 KB Output is correct
62 Correct 88 ms 24200 KB Output is correct
63 Correct 84 ms 20084 KB Output is correct
64 Correct 107 ms 23268 KB Output is correct
65 Correct 85 ms 17032 KB Output is correct
66 Correct 87 ms 18600 KB Output is correct
67 Correct 86 ms 21676 KB Output is correct
68 Correct 91 ms 24016 KB Output is correct
69 Correct 326 ms 20168 KB Output is correct
70 Correct 358 ms 24000 KB Output is correct
71 Correct 371 ms 24092 KB Output is correct
72 Correct 386 ms 20228 KB Output is correct
73 Correct 460 ms 20128 KB Output is correct
74 Correct 566 ms 20340 KB Output is correct
75 Correct 563 ms 24256 KB Output is correct
76 Correct 386 ms 19388 KB Output is correct
77 Correct 404 ms 21744 KB Output is correct
78 Correct 429 ms 24096 KB Output is correct
79 Correct 470 ms 17076 KB Output is correct
80 Correct 512 ms 19428 KB Output is correct
81 Correct 517 ms 21684 KB Output is correct
82 Correct 524 ms 24056 KB Output is correct
83 Correct 507 ms 16428 KB Output is correct
84 Correct 1639 ms 20552 KB Output is correct
85 Correct 896 ms 19620 KB Output is correct
86 Correct 1035 ms 16620 KB Output is correct
87 Execution timed out 2059 ms 16568 KB Time limit exceeded
88 Halted 0 ms 0 KB -