oj.uz

Submission #973351

# Submission time Handle Problem Language Result Execution time Memory
973351 2024-05-01T19:47:45 Z vladilius Joker (BOI20_joker) C++17
14 / 100
 2000 ms 26144 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second

struct dsu{
    vector<pair<int&, int>> hist;
    vector<int> sz, p;
    vector<bool> f;
    int n;
    dsu(int ns){
        n = ns;
        p.resize(2 * n + 1);
        sz.resize(2 * n + 1);
        for (int i = 1; i <= 2 * n; i++){
            p[i] = i;
            sz[i] = 1;
        }
    }
    int get(int v){
        if (p[v] != v){
            return get(p[v]);
        }
        return v;
    }
    int op(int v){
        return v + n;
    }
    void unite(int x, int y){
        x = get(x); y = get(y);
        if (x == y) return;
        if (sz[x] > sz[y]) swap(x, y);
        hist.pb({p[x], p[x]});
        hist.pb({sz[y], sz[y]});
        p[x] = y;
        sz[y] += sz[x];
    }
    bool add(pii P){
        auto [x, y] = P;
        if (!x) return 0;
        unite(x, op(y));
        unite(y, op(x));
        bool k = ((!f.empty() && f.back()) | (get(x) == get(y)));
        f.pb(k);
        return k;
    }
    void clear(){
        while (!hist.empty()){
            hist.back().ff = hist.back().ss;
            hist.pop_back();
        }
        f.clear();
    }
};

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n, M, q; cin>>n>>M>>q;
    vector<pii> ed = {{0, 0}};
    for (int i = 1; i <= M; i++){
        int u, v; cin>>u>>v;
        ed.pb({u, v});
    }
    dsu T(n);
    for (int i = 1; i <= M; i++){
        T.add(ed[i]);
    }
    if (!T.f.back()){
        for (int i = 1; i <= q; i++){
            cout<<"NO"<<"\n";
        }
        return 0;
    }
    T.clear();
    
    vector<int> last(M + 1);
    function<void(int, int, pii)> solve = [&](int l, int r, pii R){
        if (l > r) return;

        vector<int> x1(2 * n + 1);
        for (int i = 1; i <= 2 * n; i++){
            x1[i] = T.get(i);
        }

        int m = (l + r) / 2;
        int S = (int) T.hist.size(), Sf = (int) T.f.size();
        for (int i = l; i < m; i++){
            T.add(ed[i]);
        }
        
        int i = R.ss;
        while (T.f.empty() || !T.f.back()){
            T.add(ed[i--]);
        }
        last[m] = i;
        while (T.hist.size() != S){
            T.hist.back().ff = T.hist.back().ss;
            T.hist.pop_back();
        }
        while (T.f.size() != Sf){
            T.f.pop_back();
        }
        
        S = (int) T.hist.size(); Sf = (int) T.f.size();
        for (int i = last[m] + 1; i <= R.ss; i++){
            T.add(ed[i]);
        }
        solve(l, m - 1, {R.ff, last[m]});
        while (T.hist.size() != S){
            T.hist.back().ff = T.hist.back().ss;
            T.hist.pop_back();
        }
        while (T.f.size() != Sf){
            T.f.pop_back();
        }
        
        S = (int) T.hist.size(); Sf = (int) T.f.size();
        for (int i = l; i <= m; i++){
            T.add(ed[i]);
        }
        solve(m + 1, r, {last[m], R.ss});
        while (T.hist.size() != S){
            T.hist.back().ff = T.hist.back().ss;
            T.hist.pop_back();
        }
        while (T.f.size() != Sf){
            T.f.pop_back();
        }
    };
    
    solve(1, M, {0, M});

    while (q--){
        int l, r; cin>>l>>r;
        cout<<((r <= last[l]) ? "YES" : "NO")<<"\n";
    }
}

Compilation message

Joker.cpp: In lambda function:
Joker.cpp:102:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int&, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  102 |         while (T.hist.size() != S){
      |                ~~~~~~~~~~~~~~^~~~
Joker.cpp:106:27: warning: comparison of integer expressions of different signedness: 'std::vector<bool>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  106 |         while (T.f.size() != Sf){
      |                ~~~~~~~~~~~^~~~~
Joker.cpp:115:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int&, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  115 |         while (T.hist.size() != S){
      |                ~~~~~~~~~~~~~~^~~~
Joker.cpp:119:27: warning: comparison of integer expressions of different signedness: 'std::vector<bool>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  119 |         while (T.f.size() != Sf){
      |                ~~~~~~~~~~~^~~~~
Joker.cpp:128:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int&, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  128 |         while (T.hist.size() != S){
      |                ~~~~~~~~~~~~~~^~~~
Joker.cpp:132:27: warning: comparison of integer expressions of different signedness: 'std::vector<bool>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  132 |         while (T.f.size() != Sf){
      |                ~~~~~~~~~~~^~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 504 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 504 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 42 ms 608 KB Output is correct
31 Correct 34 ms 724 KB Output is correct
32 Correct 17 ms 600 KB Output is correct
33 Correct 11 ms 344 KB Output is correct
34 Correct 39 ms 808 KB Output is correct
35 Correct 51 ms 808 KB Output is correct
36 Correct 10 ms 604 KB Output is correct
37 Correct 26 ms 828 KB Output is correct
38 Correct 2 ms 604 KB Output is correct
39 Correct 22 ms 604 KB Output is correct
40 Correct 15 ms 656 KB Output is correct
41 Correct 16 ms 600 KB Output is correct
42 Correct 14 ms 604 KB Output is correct
43 Correct 10 ms 588 KB Output is correct
44 Correct 18 ms 600 KB Output is correct
45 Correct 29 ms 1008 KB Output is correct
46 Correct 48 ms 816 KB Output is correct
47 Correct 11 ms 600 KB Output is correct
48 Correct 14 ms 600 KB Output is correct
49 Correct 26 ms 600 KB Output is correct
50 Correct 34 ms 808 KB Output is correct
51 Correct 12 ms 604 KB Output is correct
52 Correct 18 ms 604 KB Output is correct
53 Correct 28 ms 600 KB Output is correct
54 Correct 48 ms 792 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Execution timed out 2041 ms 26144 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 504 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Execution timed out 2041 ms 26144 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 504 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 42 ms 608 KB Output is correct
31 Correct 34 ms 724 KB Output is correct
32 Correct 17 ms 600 KB Output is correct
33 Correct 11 ms 344 KB Output is correct
34 Correct 39 ms 808 KB Output is correct
35 Correct 51 ms 808 KB Output is correct
36 Correct 10 ms 604 KB Output is correct
37 Correct 26 ms 828 KB Output is correct
38 Correct 2 ms 604 KB Output is correct
39 Correct 22 ms 604 KB Output is correct
40 Correct 15 ms 656 KB Output is correct
41 Correct 16 ms 600 KB Output is correct
42 Correct 14 ms 604 KB Output is correct
43 Correct 10 ms 588 KB Output is correct
44 Correct 18 ms 600 KB Output is correct
45 Correct 29 ms 1008 KB Output is correct
46 Correct 48 ms 816 KB Output is correct
47 Correct 11 ms 600 KB Output is correct
48 Correct 14 ms 600 KB Output is correct
49 Correct 26 ms 600 KB Output is correct
50 Correct 34 ms 808 KB Output is correct
51 Correct 12 ms 604 KB Output is correct
52 Correct 18 ms 604 KB Output is correct
53 Correct 28 ms 600 KB Output is correct
54 Correct 48 ms 792 KB Output is correct
55 Execution timed out 2063 ms 25144 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 504 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 42 ms 608 KB Output is correct
31 Correct 34 ms 724 KB Output is correct
32 Correct 17 ms 600 KB Output is correct
33 Correct 11 ms 344 KB Output is correct
34 Correct 39 ms 808 KB Output is correct
35 Correct 51 ms 808 KB Output is correct
36 Correct 10 ms 604 KB Output is correct
37 Correct 26 ms 828 KB Output is correct
38 Correct 2 ms 604 KB Output is correct
39 Correct 22 ms 604 KB Output is correct
40 Correct 15 ms 656 KB Output is correct
41 Correct 16 ms 600 KB Output is correct
42 Correct 14 ms 604 KB Output is correct
43 Correct 10 ms 588 KB Output is correct
44 Correct 18 ms 600 KB Output is correct
45 Correct 29 ms 1008 KB Output is correct
46 Correct 48 ms 816 KB Output is correct
47 Correct 11 ms 600 KB Output is correct
48 Correct 14 ms 600 KB Output is correct
49 Correct 26 ms 600 KB Output is correct
50 Correct 34 ms 808 KB Output is correct
51 Correct 12 ms 604 KB Output is correct
52 Correct 18 ms 604 KB Output is correct
53 Correct 28 ms 600 KB Output is correct
54 Correct 48 ms 792 KB Output is correct
55 Execution timed out 2041 ms 26144 KB Time limit exceeded
56 Halted 0 ms 0 KB -