oj.uz

Submission #1109273

# Submission time Handle Problem Language Result Execution time Memory
1109273 2024-11-06T10:06:56 Z AverageAmogusEnjoyer Joker (BOI20_joker) C++17
100 / 100
 1571 ms 24988 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template<class T> bool cmin(T &i, T j) { return i > j ? i=j,true:false; }
template<class T> bool cmax(T &i, T j) { return i < j ? i=j,true:false; }

constexpr int nax = 200200,block_size = 450;
vector<tuple<int,int,int>> queries[block_size]; // r,l,idx
vector<bool> ans;
int edges[nax][2];
int n,m;

struct dsu_save {
    int x,y,lzx,lzy,szx,szy,parx,pary;
};

struct DSU {
    int lz[nax];
    int par[nax];
    int sz[nax];
    dsu_save stk[nax];
    int T = 0;
    DSU(int N) {
        for (int i = 0; i < N; i++)
            lz[i] = 0, par[i] = i, sz[i] = 1;
    }
    int get(int x,int &cx) {
        cx ^= lz[x];
        return (x == par[x] ? x : get(par[x],cx));
    }
    bool need_reset = 0;
    bool unite(int x,int y) {
        assert(!need_reset);

        // cout << "Adding edge: " << x + 1 << " " << y + 1 << endl;

        int cx = 0,cy = 0;
        int px = get(x,cx), py = get(y,cy);

        // cout << px + 1 << " " << py + 1 << " " << cx << " " << cy << endl;
        if (sz[px] < sz[py]) 
            swap(px,py), swap(cx,cy);
        stk[T++] = {px,py,lz[px],lz[py],sz[px],sz[py],par[px],par[py]};
        if (cx == cy) {
            if (px == py) {
                need_reset = 1;
                return 1;
            } else {
                lz[py] ^= 1;
                sz[px] += sz[py];
                par[py] = px;
            }
        } else {
            if (px != py) {
                sz[px] += sz[py];
                par[py] = px;
            }
        }
        return 0;
    }
    void rollback(int k) {
        need_reset = 0;
        // do stuff
        assert(T >= k);
        while(k--) {
            auto &c = stk[--T];
            lz[c.x] = c.lzx,lz[c.y] = c.lzy,par[c.x] = c.parx,par[c.y] = c.pary,sz[c.x] = c.szx,sz[c.y] = c.szy;
        }
    }
};

DSU dsu(nax); 

bool solve_block(int block) {
    int current_r = m - 1;
    for (int i = max(0,(block - 1) * block_size); i < min(m,block * block_size); i++) {
        // cout << "edge index: " << i + 1 << endl;
        if (dsu.unite(edges[i][0],edges[i][1])) {
            for (int B = block; B < block_size; B++) 
                for (auto &[r,l,idx]: queries[B])
                    ans[idx] = 1;
            return 1;
        }
    }
    for (int i = 0; i < queries[block].size(); i++) {
        auto &[r,l,idx] = queries[block][i];
        while(current_r >= r) {
            // cout << "edge index: " << current_r + 1 << endl;
            if (dsu.unite(edges[current_r][0],edges[current_r][1])) {
                for (int j = i; j < queries[block].size(); j++) {
                    int idx2 = get<2>(queries[block][j]);
                    ans[idx2] = 1;
                }
                dsu.rollback(m - current_r); // potrebbero essere necessari dei +- 1
                return 0;
            }
            current_r--;
        }
        --l;
        int inserted = 0;
        while(l >= block * block_size) {
            // devo inserirlo
            inserted++;
            // cout << "edge index: " << l + 1 << endl;
            if (dsu.unite(edges[l][0],edges[l][1])) {
                ans[idx] = 1;
                break;
            }
            l--;
        }
        dsu.rollback(inserted);
    }
    dsu.rollback(m - current_r - 1);
    return 0;
}

vector<bool> trova_cicli(int N, int M, int Q, vector<int> A, vector<int> B, vector<int> L, vector<int> R) {
    n = N, m = M;
    for (int i = 0; i < M; i++)
        edges[i][0] = A[i],edges[i][1] = B[i];
    ans.resize(Q);
    for (int i = 0; i < Q; i++) 
        queries[L[i] / block_size].emplace_back(R[i],L[i],i);
    for (int i = 0; i < block_size; i++) 
        sort(queries[i].rbegin(),queries[i].rend());
    for (int i = 0; i < block_size; i++) 
        if (solve_block(i))
            break;
    return ans;
}

int main() {

    int N,M,Q;
    cin >> N >> M >> Q;
    vector<int> A(M),B(M),L(Q),R(Q);
    for (int i = 0; i < M; i++) {
        cin >> A[i] >> B[i];
        --A[i],--B[i];
    }
    for (int i = 0; i < Q; i++) {
        cin >> L[i] >> R[i];
        --L[i];
    }
    auto res = trova_cicli(N,M,Q,A,B,L,R);
    for (int i = 0; i < Q; i++) 
        cout << (res[i] ? "YES" : "NO") << "\n";

}

Compilation message

Joker.cpp: In function 'bool solve_block(int)':
Joker.cpp:87:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |     for (int i = 0; i < queries[block].size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~~~~~~~
Joker.cpp:92:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |                 for (int j = i; j < queries[block].size(); j++) {
      |                                 ~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4688 KB Output is correct
2 Correct 2 ms 4688 KB Output is correct
3 Correct 1 ms 4688 KB Output is correct
4 Correct 2 ms 4688 KB Output is correct
5 Correct 1 ms 4860 KB Output is correct
6 Correct 1 ms 4688 KB Output is correct
7 Correct 2 ms 4860 KB Output is correct
8 Correct 1 ms 4688 KB Output is correct
9 Correct 1 ms 4732 KB Output is correct
10 Correct 1 ms 4688 KB Output is correct
11 Correct 2 ms 4856 KB Output is correct
12 Correct 2 ms 4688 KB Output is correct
13 Correct 2 ms 4688 KB Output is correct
14 Correct 2 ms 4688 KB Output is correct
15 Correct 2 ms 4688 KB Output is correct
16 Correct 2 ms 4688 KB Output is correct
17 Correct 2 ms 4736 KB Output is correct
18 Correct 2 ms 4856 KB Output is correct
19 Correct 1 ms 4724 KB Output is correct
20 Correct 2 ms 4704 KB Output is correct
21 Correct 1 ms 4688 KB Output is correct
22 Correct 2 ms 4688 KB Output is correct
23 Correct 2 ms 4688 KB Output is correct
24 Correct 1 ms 4688 KB Output is correct
25 Correct 1 ms 4688 KB Output is correct
26 Correct 1 ms 4688 KB Output is correct
27 Correct 1 ms 4688 KB Output is correct
28 Correct 1 ms 4860 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4688 KB Output is correct
2 Correct 2 ms 4688 KB Output is correct
3 Correct 1 ms 4688 KB Output is correct
4 Correct 2 ms 4688 KB Output is correct
5 Correct 1 ms 4860 KB Output is correct
6 Correct 1 ms 4688 KB Output is correct
7 Correct 2 ms 4860 KB Output is correct
8 Correct 1 ms 4688 KB Output is correct
9 Correct 1 ms 4732 KB Output is correct
10 Correct 1 ms 4688 KB Output is correct
11 Correct 2 ms 4856 KB Output is correct
12 Correct 2 ms 4688 KB Output is correct
13 Correct 2 ms 4688 KB Output is correct
14 Correct 2 ms 4688 KB Output is correct
15 Correct 2 ms 4688 KB Output is correct
16 Correct 2 ms 4688 KB Output is correct
17 Correct 2 ms 4736 KB Output is correct
18 Correct 2 ms 4856 KB Output is correct
19 Correct 1 ms 4724 KB Output is correct
20 Correct 2 ms 4704 KB Output is correct
21 Correct 1 ms 4688 KB Output is correct
22 Correct 2 ms 4688 KB Output is correct
23 Correct 2 ms 4688 KB Output is correct
24 Correct 1 ms 4688 KB Output is correct
25 Correct 1 ms 4688 KB Output is correct
26 Correct 1 ms 4688 KB Output is correct
27 Correct 1 ms 4688 KB Output is correct
28 Correct 1 ms 4860 KB Output is correct
29 Correct 6 ms 4688 KB Output is correct
30 Correct 5 ms 4688 KB Output is correct
31 Correct 5 ms 4688 KB Output is correct
32 Correct 4 ms 4688 KB Output is correct
33 Correct 4 ms 4860 KB Output is correct
34 Correct 5 ms 4732 KB Output is correct
35 Correct 5 ms 4860 KB Output is correct
36 Correct 5 ms 4856 KB Output is correct
37 Correct 6 ms 4788 KB Output is correct
38 Correct 7 ms 4688 KB Output is correct
39 Correct 6 ms 4688 KB Output is correct
40 Correct 5 ms 4688 KB Output is correct
41 Correct 5 ms 4688 KB Output is correct
42 Correct 5 ms 4688 KB Output is correct
43 Correct 3 ms 4872 KB Output is correct
44 Correct 3 ms 4688 KB Output is correct
45 Correct 3 ms 4688 KB Output is correct
46 Correct 4 ms 4688 KB Output is correct
47 Correct 5 ms 4688 KB Output is correct
48 Correct 5 ms 4688 KB Output is correct
49 Correct 6 ms 4688 KB Output is correct
50 Correct 5 ms 4788 KB Output is correct
51 Correct 4 ms 4856 KB Output is correct
52 Correct 4 ms 4688 KB Output is correct
53 Correct 5 ms 4688 KB Output is correct
54 Correct 6 ms 4856 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4688 KB Output is correct
2 Correct 2 ms 4688 KB Output is correct
3 Correct 151 ms 17080 KB Output is correct
4 Correct 157 ms 22452 KB Output is correct
5 Correct 169 ms 22712 KB Output is correct
6 Correct 160 ms 19292 KB Output is correct
7 Correct 160 ms 20920 KB Output is correct
8 Correct 167 ms 20368 KB Output is correct
9 Correct 165 ms 17080 KB Output is correct
10 Correct 195 ms 20668 KB Output is correct
11 Correct 163 ms 17084 KB Output is correct
12 Correct 160 ms 16932 KB Output is correct
13 Correct 166 ms 19896 KB Output is correct
14 Correct 180 ms 21008 KB Output is correct
15 Correct 180 ms 20920 KB Output is correct
16 Correct 167 ms 21176 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4688 KB Output is correct
2 Correct 2 ms 4688 KB Output is correct
3 Correct 1 ms 4688 KB Output is correct
4 Correct 2 ms 4688 KB Output is correct
5 Correct 1 ms 4860 KB Output is correct
6 Correct 1 ms 4688 KB Output is correct
7 Correct 2 ms 4860 KB Output is correct
8 Correct 1 ms 4688 KB Output is correct
9 Correct 1 ms 4732 KB Output is correct
10 Correct 1 ms 4688 KB Output is correct
11 Correct 2 ms 4856 KB Output is correct
12 Correct 2 ms 4688 KB Output is correct
13 Correct 2 ms 4688 KB Output is correct
14 Correct 2 ms 4688 KB Output is correct
15 Correct 2 ms 4688 KB Output is correct
16 Correct 2 ms 4688 KB Output is correct
17 Correct 2 ms 4736 KB Output is correct
18 Correct 2 ms 4856 KB Output is correct
19 Correct 1 ms 4724 KB Output is correct
20 Correct 2 ms 4704 KB Output is correct
21 Correct 1 ms 4688 KB Output is correct
22 Correct 2 ms 4688 KB Output is correct
23 Correct 2 ms 4688 KB Output is correct
24 Correct 1 ms 4688 KB Output is correct
25 Correct 1 ms 4688 KB Output is correct
26 Correct 1 ms 4688 KB Output is correct
27 Correct 1 ms 4688 KB Output is correct
28 Correct 1 ms 4860 KB Output is correct
29 Correct 151 ms 17080 KB Output is correct
30 Correct 157 ms 22452 KB Output is correct
31 Correct 169 ms 22712 KB Output is correct
32 Correct 160 ms 19292 KB Output is correct
33 Correct 160 ms 20920 KB Output is correct
34 Correct 167 ms 20368 KB Output is correct
35 Correct 165 ms 17080 KB Output is correct
36 Correct 195 ms 20668 KB Output is correct
37 Correct 163 ms 17084 KB Output is correct
38 Correct 160 ms 16932 KB Output is correct
39 Correct 166 ms 19896 KB Output is correct
40 Correct 180 ms 21008 KB Output is correct
41 Correct 180 ms 20920 KB Output is correct
42 Correct 167 ms 21176 KB Output is correct
43 Correct 375 ms 21172 KB Output is correct
44 Correct 384 ms 22744 KB Output is correct
45 Correct 387 ms 23492 KB Output is correct
46 Correct 300 ms 21172 KB Output is correct
47 Correct 304 ms 20872 KB Output is correct
48 Correct 225 ms 19892 KB Output is correct
49 Correct 232 ms 17952 KB Output is correct
50 Correct 342 ms 21176 KB Output is correct
51 Correct 360 ms 20916 KB Output is correct
52 Correct 359 ms 19892 KB Output is correct
53 Correct 340 ms 20412 KB Output is correct
54 Correct 393 ms 17688 KB Output is correct
55 Correct 407 ms 20624 KB Output is correct
56 Correct 407 ms 20092 KB Output is correct

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4688 KB Output is correct
2 Correct 2 ms 4688 KB Output is correct
3 Correct 1 ms 4688 KB Output is correct
4 Correct 2 ms 4688 KB Output is correct
5 Correct 1 ms 4860 KB Output is correct
6 Correct 1 ms 4688 KB Output is correct
7 Correct 2 ms 4860 KB Output is correct
8 Correct 1 ms 4688 KB Output is correct
9 Correct 1 ms 4732 KB Output is correct
10 Correct 1 ms 4688 KB Output is correct
11 Correct 2 ms 4856 KB Output is correct
12 Correct 2 ms 4688 KB Output is correct
13 Correct 2 ms 4688 KB Output is correct
14 Correct 2 ms 4688 KB Output is correct
15 Correct 2 ms 4688 KB Output is correct
16 Correct 2 ms 4688 KB Output is correct
17 Correct 2 ms 4736 KB Output is correct
18 Correct 2 ms 4856 KB Output is correct
19 Correct 1 ms 4724 KB Output is correct
20 Correct 2 ms 4704 KB Output is correct
21 Correct 1 ms 4688 KB Output is correct
22 Correct 2 ms 4688 KB Output is correct
23 Correct 2 ms 4688 KB Output is correct
24 Correct 1 ms 4688 KB Output is correct
25 Correct 1 ms 4688 KB Output is correct
26 Correct 1 ms 4688 KB Output is correct
27 Correct 1 ms 4688 KB Output is correct
28 Correct 1 ms 4860 KB Output is correct
29 Correct 6 ms 4688 KB Output is correct
30 Correct 5 ms 4688 KB Output is correct
31 Correct 5 ms 4688 KB Output is correct
32 Correct 4 ms 4688 KB Output is correct
33 Correct 4 ms 4860 KB Output is correct
34 Correct 5 ms 4732 KB Output is correct
35 Correct 5 ms 4860 KB Output is correct
36 Correct 5 ms 4856 KB Output is correct
37 Correct 6 ms 4788 KB Output is correct
38 Correct 7 ms 4688 KB Output is correct
39 Correct 6 ms 4688 KB Output is correct
40 Correct 5 ms 4688 KB Output is correct
41 Correct 5 ms 4688 KB Output is correct
42 Correct 5 ms 4688 KB Output is correct
43 Correct 3 ms 4872 KB Output is correct
44 Correct 3 ms 4688 KB Output is correct
45 Correct 3 ms 4688 KB Output is correct
46 Correct 4 ms 4688 KB Output is correct
47 Correct 5 ms 4688 KB Output is correct
48 Correct 5 ms 4688 KB Output is correct
49 Correct 6 ms 4688 KB Output is correct
50 Correct 5 ms 4788 KB Output is correct
51 Correct 4 ms 4856 KB Output is correct
52 Correct 4 ms 4688 KB Output is correct
53 Correct 5 ms 4688 KB Output is correct
54 Correct 6 ms 4856 KB Output is correct
55 Correct 304 ms 13640 KB Output is correct
56 Correct 1244 ms 16380 KB Output is correct
57 Correct 89 ms 15992 KB Output is correct
58 Correct 80 ms 13852 KB Output is correct
59 Correct 189 ms 13712 KB Output is correct
60 Correct 318 ms 13964 KB Output is correct
61 Correct 184 ms 13828 KB Output is correct
62 Correct 351 ms 13896 KB Output is correct
63 Correct 93 ms 13680 KB Output is correct
64 Correct 214 ms 13712 KB Output is correct
65 Correct 383 ms 13964 KB Output is correct

Subtask #6
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4688 KB Output is correct
2 Correct 2 ms 4688 KB Output is correct
3 Correct 1 ms 4688 KB Output is correct
4 Correct 2 ms 4688 KB Output is correct
5 Correct 1 ms 4860 KB Output is correct
6 Correct 1 ms 4688 KB Output is correct
7 Correct 2 ms 4860 KB Output is correct
8 Correct 1 ms 4688 KB Output is correct
9 Correct 1 ms 4732 KB Output is correct
10 Correct 1 ms 4688 KB Output is correct
11 Correct 2 ms 4856 KB Output is correct
12 Correct 2 ms 4688 KB Output is correct
13 Correct 2 ms 4688 KB Output is correct
14 Correct 2 ms 4688 KB Output is correct
15 Correct 2 ms 4688 KB Output is correct
16 Correct 2 ms 4688 KB Output is correct
17 Correct 2 ms 4736 KB Output is correct
18 Correct 2 ms 4856 KB Output is correct
19 Correct 1 ms 4724 KB Output is correct
20 Correct 2 ms 4704 KB Output is correct
21 Correct 1 ms 4688 KB Output is correct
22 Correct 2 ms 4688 KB Output is correct
23 Correct 2 ms 4688 KB Output is correct
24 Correct 1 ms 4688 KB Output is correct
25 Correct 1 ms 4688 KB Output is correct
26 Correct 1 ms 4688 KB Output is correct
27 Correct 1 ms 4688 KB Output is correct
28 Correct 1 ms 4860 KB Output is correct
29 Correct 6 ms 4688 KB Output is correct
30 Correct 5 ms 4688 KB Output is correct
31 Correct 5 ms 4688 KB Output is correct
32 Correct 4 ms 4688 KB Output is correct
33 Correct 4 ms 4860 KB Output is correct
34 Correct 5 ms 4732 KB Output is correct
35 Correct 5 ms 4860 KB Output is correct
36 Correct 5 ms 4856 KB Output is correct
37 Correct 6 ms 4788 KB Output is correct
38 Correct 7 ms 4688 KB Output is correct
39 Correct 6 ms 4688 KB Output is correct
40 Correct 5 ms 4688 KB Output is correct
41 Correct 5 ms 4688 KB Output is correct
42 Correct 5 ms 4688 KB Output is correct
43 Correct 3 ms 4872 KB Output is correct
44 Correct 3 ms 4688 KB Output is correct
45 Correct 3 ms 4688 KB Output is correct
46 Correct 4 ms 4688 KB Output is correct
47 Correct 5 ms 4688 KB Output is correct
48 Correct 5 ms 4688 KB Output is correct
49 Correct 6 ms 4688 KB Output is correct
50 Correct 5 ms 4788 KB Output is correct
51 Correct 4 ms 4856 KB Output is correct
52 Correct 4 ms 4688 KB Output is correct
53 Correct 5 ms 4688 KB Output is correct
54 Correct 6 ms 4856 KB Output is correct
55 Correct 151 ms 17080 KB Output is correct
56 Correct 157 ms 22452 KB Output is correct
57 Correct 169 ms 22712 KB Output is correct
58 Correct 160 ms 19292 KB Output is correct
59 Correct 160 ms 20920 KB Output is correct
60 Correct 167 ms 20368 KB Output is correct
61 Correct 165 ms 17080 KB Output is correct
62 Correct 195 ms 20668 KB Output is correct
63 Correct 163 ms 17084 KB Output is correct
64 Correct 160 ms 16932 KB Output is correct
65 Correct 166 ms 19896 KB Output is correct
66 Correct 180 ms 21008 KB Output is correct
67 Correct 180 ms 20920 KB Output is correct
68 Correct 167 ms 21176 KB Output is correct
69 Correct 375 ms 21172 KB Output is correct
70 Correct 384 ms 22744 KB Output is correct
71 Correct 387 ms 23492 KB Output is correct
72 Correct 300 ms 21172 KB Output is correct
73 Correct 304 ms 20872 KB Output is correct
74 Correct 225 ms 19892 KB Output is correct
75 Correct 232 ms 17952 KB Output is correct
76 Correct 342 ms 21176 KB Output is correct
77 Correct 360 ms 20916 KB Output is correct
78 Correct 359 ms 19892 KB Output is correct
79 Correct 340 ms 20412 KB Output is correct
80 Correct 393 ms 17688 KB Output is correct
81 Correct 407 ms 20624 KB Output is correct
82 Correct 407 ms 20092 KB Output is correct
83 Correct 304 ms 13640 KB Output is correct
84 Correct 1244 ms 16380 KB Output is correct
85 Correct 89 ms 15992 KB Output is correct
86 Correct 80 ms 13852 KB Output is correct
87 Correct 189 ms 13712 KB Output is correct
88 Correct 318 ms 13964 KB Output is correct
89 Correct 184 ms 13828 KB Output is correct
90 Correct 351 ms 13896 KB Output is correct
91 Correct 93 ms 13680 KB Output is correct
92 Correct 214 ms 13712 KB Output is correct
93 Correct 383 ms 13964 KB Output is correct
94 Correct 622 ms 22344 KB Output is correct
95 Correct 1571 ms 24988 KB Output is correct
96 Correct 502 ms 24648 KB Output is correct
97 Correct 341 ms 22604 KB Output is correct
98 Correct 357 ms 22432 KB Output is correct
99 Correct 217 ms 22344 KB Output is correct
100 Correct 325 ms 21772 KB Output is correct
101 Correct 455 ms 22432 KB Output is correct
102 Correct 599 ms 22668 KB Output is correct
103 Correct 756 ms 22600 KB Output is correct
104 Correct 397 ms 22304 KB Output is correct
105 Correct 547 ms 21584 KB Output is correct
106 Correct 804 ms 22600 KB Output is correct
107 Correct 485 ms 24760 KB Output is correct
108 Correct 816 ms 22308 KB Output is correct
109 Correct 805 ms 22300 KB Output is correct
110 Correct 820 ms 21448 KB Output is correct
111 Correct 923 ms 22472 KB Output is correct
112 Correct 836 ms 22344 KB Output is correct
113 Correct 912 ms 22352 KB Output is correct
114 Correct 848 ms 22492 KB Output is correct
115 Correct 829 ms 22556 KB Output is correct
116 Correct 812 ms 22452 KB Output is correct