oj.uz

Submission #877325

# Submission time Handle Problem Language Result Execution time Memory
877325 2023-11-23T06:29:55 Z huutuan Joker (BOI20_joker) C++14
14 / 100
 2000 ms 13884 KB 
#include<bits/stdc++.h>
#define taskname "nohome"

using namespace std;

struct DSU{
   vector<int> lab, val;
   bool ans=1;
   void init(int n){
      lab.assign(n+1, -1);
      val.assign(n+1, 0);
   }
   pair<int, int> find_set(int u){
      if (lab[u]<0) return {u, 0};
      auto p=find_set(lab[u]);
      lab[u]=p.first;
      val[u]^=p.second;
      return {lab[u], val[u]};
   }
   void union_sets(int u, int v){
      auto pu=find_set(u), pv=find_set(v);
      if (pu.first!=pv.first){
         if (lab[pu.first]>lab[pv.first]) swap(pu, pv), swap(u, v);
         lab[pu.first]+=lab[pv.first];
         val[pu.first]=0;
         lab[pv.first]=pu.first;
         val[pv.first]=pu.second^pv.second^1;
      }else
         ans&=pu.second^pv.second;
   }
};

const int N=2e5+1;
int n, m, q, ans[N];
pair<int, int> edge[N];
vector<pair<int, int>> qq[N];

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   // freopen(taskname".inp", "r", stdin);
   // freopen(taskname".out", "w", stdout);
   cin >> n >> m >> q;
   bool sus=1;
   for (int i=1; i<=m; ++i){
      int x, y; cin >> x >> y;
      edge[i]={x, y};
      sus&=x==1;
   }
   if (sus){
      for (int i=1; i<=q; ++i){
         int l, r; cin >> l >> r;
         qq[l].emplace_back(r, i);
      }
      DSU dsu;
      dsu.init(n);
      for (int i=1; i<=m; ++i){
         if (qq[i].size()){
            DSU dsu2=dsu;
            sort(qq[i].rbegin(), qq[i].rend());
            int cur=m;
            for (auto &j:qq[i]){
               while (cur>j.first){
                  dsu2.union_sets(edge[cur].first, edge[cur].second);
                  --cur;
               }
               ans[j.second]=!dsu2.ans;
            }
         }
         dsu.union_sets(edge[i].first, edge[i].second);
      }
   }else{
      for (int i=1; i<=q; ++i){
         int l, r; cin >> l >> r;
         qq[r].emplace_back(l, i);
      }
      DSU dsu;
      dsu.init(n);
      for (int i=m; i>=1; --i){
         if (qq[i].size()){
            DSU dsu2=dsu;
            sort(qq[i].begin(), qq[i].end());
            int cur=1;
            for (auto &j:qq[i]){
               while (cur<j.first){
                  dsu2.union_sets(edge[cur].first, edge[cur].second);
                  ++cur;
               }
               ans[j.second]=!dsu2.ans;
            }
         }
         dsu.union_sets(edge[i].first, edge[i].second);
      }
   }
   for (int i=1; i<=q; ++i) 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 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6744 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 1 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 1 ms 6784 KB Output is correct
8 Correct 1 ms 6744 KB Output is correct
9 Correct 1 ms 6744 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 1 ms 6748 KB Output is correct
12 Correct 1 ms 6748 KB Output is correct
13 Correct 1 ms 6788 KB Output is correct
14 Correct 1 ms 6752 KB Output is correct
15 Correct 2 ms 6744 KB Output is correct
16 Correct 1 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct
18 Correct 1 ms 6748 KB Output is correct
19 Correct 1 ms 6748 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 1 ms 6744 KB Output is correct
23 Correct 1 ms 6748 KB Output is correct
24 Correct 1 ms 6744 KB Output is correct
25 Correct 2 ms 6744 KB Output is correct
26 Correct 1 ms 6748 KB Output is correct
27 Correct 2 ms 6748 KB Output is correct
28 Correct 2 ms 6748 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6744 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 1 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 1 ms 6784 KB Output is correct
8 Correct 1 ms 6744 KB Output is correct
9 Correct 1 ms 6744 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 1 ms 6748 KB Output is correct
12 Correct 1 ms 6748 KB Output is correct
13 Correct 1 ms 6788 KB Output is correct
14 Correct 1 ms 6752 KB Output is correct
15 Correct 2 ms 6744 KB Output is correct
16 Correct 1 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct
18 Correct 1 ms 6748 KB Output is correct
19 Correct 1 ms 6748 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 1 ms 6744 KB Output is correct
23 Correct 1 ms 6748 KB Output is correct
24 Correct 1 ms 6744 KB Output is correct
25 Correct 2 ms 6744 KB Output is correct
26 Correct 1 ms 6748 KB Output is correct
27 Correct 2 ms 6748 KB Output is correct
28 Correct 2 ms 6748 KB Output is correct
29 Correct 4 ms 6748 KB Output is correct
30 Correct 6 ms 6748 KB Output is correct
31 Correct 7 ms 6748 KB Output is correct
32 Correct 6 ms 6748 KB Output is correct
33 Correct 5 ms 6748 KB Output is correct
34 Correct 6 ms 6744 KB Output is correct
35 Correct 7 ms 6748 KB Output is correct
36 Correct 5 ms 6748 KB Output is correct
37 Correct 6 ms 6748 KB Output is correct
38 Correct 10 ms 6748 KB Output is correct
39 Correct 5 ms 6748 KB Output is correct
40 Correct 5 ms 6748 KB Output is correct
41 Correct 5 ms 6752 KB Output is correct
42 Correct 5 ms 6748 KB Output is correct
43 Correct 10 ms 6748 KB Output is correct
44 Correct 11 ms 6748 KB Output is correct
45 Correct 13 ms 6748 KB Output is correct
46 Correct 14 ms 6744 KB Output is correct
47 Correct 5 ms 6744 KB Output is correct
48 Correct 6 ms 6748 KB Output is correct
49 Correct 6 ms 6744 KB Output is correct
50 Correct 6 ms 6748 KB Output is correct
51 Correct 5 ms 6756 KB Output is correct
52 Correct 6 ms 6748 KB Output is correct
53 Correct 6 ms 6744 KB Output is correct
54 Correct 8 ms 7004 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 1884 ms 12740 KB Output is correct
4 Execution timed out 2053 ms 13884 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6744 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 1 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 1 ms 6784 KB Output is correct
8 Correct 1 ms 6744 KB Output is correct
9 Correct 1 ms 6744 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 1 ms 6748 KB Output is correct
12 Correct 1 ms 6748 KB Output is correct
13 Correct 1 ms 6788 KB Output is correct
14 Correct 1 ms 6752 KB Output is correct
15 Correct 2 ms 6744 KB Output is correct
16 Correct 1 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct
18 Correct 1 ms 6748 KB Output is correct
19 Correct 1 ms 6748 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 1 ms 6744 KB Output is correct
23 Correct 1 ms 6748 KB Output is correct
24 Correct 1 ms 6744 KB Output is correct
25 Correct 2 ms 6744 KB Output is correct
26 Correct 1 ms 6748 KB Output is correct
27 Correct 2 ms 6748 KB Output is correct
28 Correct 2 ms 6748 KB Output is correct
29 Correct 1884 ms 12740 KB Output is correct
30 Execution timed out 2053 ms 13884 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6744 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 1 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 1 ms 6784 KB Output is correct
8 Correct 1 ms 6744 KB Output is correct
9 Correct 1 ms 6744 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 1 ms 6748 KB Output is correct
12 Correct 1 ms 6748 KB Output is correct
13 Correct 1 ms 6788 KB Output is correct
14 Correct 1 ms 6752 KB Output is correct
15 Correct 2 ms 6744 KB Output is correct
16 Correct 1 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct
18 Correct 1 ms 6748 KB Output is correct
19 Correct 1 ms 6748 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 1 ms 6744 KB Output is correct
23 Correct 1 ms 6748 KB Output is correct
24 Correct 1 ms 6744 KB Output is correct
25 Correct 2 ms 6744 KB Output is correct
26 Correct 1 ms 6748 KB Output is correct
27 Correct 2 ms 6748 KB Output is correct
28 Correct 2 ms 6748 KB Output is correct
29 Correct 4 ms 6748 KB Output is correct
30 Correct 6 ms 6748 KB Output is correct
31 Correct 7 ms 6748 KB Output is correct
32 Correct 6 ms 6748 KB Output is correct
33 Correct 5 ms 6748 KB Output is correct
34 Correct 6 ms 6744 KB Output is correct
35 Correct 7 ms 6748 KB Output is correct
36 Correct 5 ms 6748 KB Output is correct
37 Correct 6 ms 6748 KB Output is correct
38 Correct 10 ms 6748 KB Output is correct
39 Correct 5 ms 6748 KB Output is correct
40 Correct 5 ms 6748 KB Output is correct
41 Correct 5 ms 6752 KB Output is correct
42 Correct 5 ms 6748 KB Output is correct
43 Correct 10 ms 6748 KB Output is correct
44 Correct 11 ms 6748 KB Output is correct
45 Correct 13 ms 6748 KB Output is correct
46 Correct 14 ms 6744 KB Output is correct
47 Correct 5 ms 6744 KB Output is correct
48 Correct 6 ms 6748 KB Output is correct
49 Correct 6 ms 6744 KB Output is correct
50 Correct 6 ms 6748 KB Output is correct
51 Correct 5 ms 6756 KB Output is correct
52 Correct 6 ms 6748 KB Output is correct
53 Correct 6 ms 6744 KB Output is correct
54 Correct 8 ms 7004 KB Output is correct
55 Correct 1387 ms 11288 KB Output is correct
56 Execution timed out 2045 ms 13172 KB Time limit exceeded
57 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6744 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 1 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 1 ms 6784 KB Output is correct
8 Correct 1 ms 6744 KB Output is correct
9 Correct 1 ms 6744 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 1 ms 6748 KB Output is correct
12 Correct 1 ms 6748 KB Output is correct
13 Correct 1 ms 6788 KB Output is correct
14 Correct 1 ms 6752 KB Output is correct
15 Correct 2 ms 6744 KB Output is correct
16 Correct 1 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct
18 Correct 1 ms 6748 KB Output is correct
19 Correct 1 ms 6748 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 1 ms 6744 KB Output is correct
23 Correct 1 ms 6748 KB Output is correct
24 Correct 1 ms 6744 KB Output is correct
25 Correct 2 ms 6744 KB Output is correct
26 Correct 1 ms 6748 KB Output is correct
27 Correct 2 ms 6748 KB Output is correct
28 Correct 2 ms 6748 KB Output is correct
29 Correct 4 ms 6748 KB Output is correct
30 Correct 6 ms 6748 KB Output is correct
31 Correct 7 ms 6748 KB Output is correct
32 Correct 6 ms 6748 KB Output is correct
33 Correct 5 ms 6748 KB Output is correct
34 Correct 6 ms 6744 KB Output is correct
35 Correct 7 ms 6748 KB Output is correct
36 Correct 5 ms 6748 KB Output is correct
37 Correct 6 ms 6748 KB Output is correct
38 Correct 10 ms 6748 KB Output is correct
39 Correct 5 ms 6748 KB Output is correct
40 Correct 5 ms 6748 KB Output is correct
41 Correct 5 ms 6752 KB Output is correct
42 Correct 5 ms 6748 KB Output is correct
43 Correct 10 ms 6748 KB Output is correct
44 Correct 11 ms 6748 KB Output is correct
45 Correct 13 ms 6748 KB Output is correct
46 Correct 14 ms 6744 KB Output is correct
47 Correct 5 ms 6744 KB Output is correct
48 Correct 6 ms 6748 KB Output is correct
49 Correct 6 ms 6744 KB Output is correct
50 Correct 6 ms 6748 KB Output is correct
51 Correct 5 ms 6756 KB Output is correct
52 Correct 6 ms 6748 KB Output is correct
53 Correct 6 ms 6744 KB Output is correct
54 Correct 8 ms 7004 KB Output is correct
55 Correct 1884 ms 12740 KB Output is correct
56 Execution timed out 2053 ms 13884 KB Time limit exceeded
57 Halted 0 ms 0 KB -