oj.uz

Submission #1050730

# Submission time Handle Problem Language Result Execution time Memory
1050730 2024-08-09T13:38:10 Z duckindog Joker (BOI20_joker) C++17
100 / 100
 239 ms 12476 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 200'000 + 10;
int n, m, q;
struct Edge { 
  int u, v;
  friend istream& operator >> (istream& is, auto& rhs) { 
    return is >> rhs.u >> rhs.v;
  }
} edge[N];
 
struct DSU { 
  int id[N], co[N], cnt;
  vector<tuple<int, int, int, int, int, int>> undo;
  bool mk[N];
  
  int root(int u) { return id[u] < 0 ? u : root(id[u]); }
  bool chk(int u) { return id[u] < 0 ? mk[u] : mk[u] ^ chk(id[u]); }
  inline int color(int u) { return co[u] ^ chk(u); }
  inline void add(int u, int v) { 
    int oU = u, oV = v;
 
    u = root(u); v = root(v);
    if (u == v) { 
      undo.emplace_back(0, 0, 0, 0, 0, cnt);
      cnt += color(oU) == color(oV); 
      return; 
    }

    if (id[u] > id[v]) swap(u, v);

    undo.emplace_back(u, id[u], v, id[v], mk[v], cnt);

    if (color(oU) == color(oV)) mk[v] ^= 1;
    id[u] += id[v];
    id[v] = u; 
  }
  inline void rollBack() { 
    auto [u, idU, v, idV, mkV, pCnt] = undo.back(); undo.pop_back();
    id[u] = idU;
    id[v] = idV;
    mk[v] = mkV;
    cnt = pCnt;
  }
} T;

int f[N];
void dnc(int l, int r, int lt, int rt) { 
  if (l > r) return;
  int mid = l + r >> 1;
  auto& ret = f[mid];
  
  for (int i = l; i < mid; ++i) T.add(edge[i].u, edge[i].v);
  for (int i = rt; i >= max(mid + 1, lt); --i) T.add(edge[i].u, edge[i].v);
 
  for (int i = max(mid + 1, lt); i <= rt; ++i) {
    const auto& [u, v] = edge[i];
    if (T.cnt) ret = i - 1;
    T.rollBack();
  } if (T.cnt) ret = rt;
  
  int nxtr = (!ret ? max(mid, lt) : ret),
      nxtl = (!ret ? mid : ret);

  T.add(edge[mid].u, edge[mid].v);
  dnc(mid + 1, r, nxtr, rt);
  for (int i = l; i <= mid; ++i) T.rollBack();

  for (int i = rt; i > nxtl; --i) T.add(edge[i].u, edge[i].v);
  dnc(l, mid - 1, lt, nxtl);
  for (int i = rt; i > nxtl; --i) T.rollBack();
}

int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);
 
  cin >> n >> m >> q;
  for (int i = 1; i <= m; ++i) cin >> edge[i];

  memset(T.id, -1, sizeof T.id);
  T.cnt = 0;

  dnc(1, m, 1, m);
  while (q--) { 
    int l, r; cin >> l >> r;
    cout << (r <= f[l] ? "YES" : "NO") << "\n";
  }
}

Compilation message

Joker.cpp:9:45: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
    9 |   friend istream& operator >> (istream& is, auto& rhs) {
      |                                             ^~~~
Joker.cpp: In function 'void dnc(int, int, int, int)':
Joker.cpp:52:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   52 |   int mid = l + r >> 1;
      |             ~~^~~
Joker.cpp:59:17: warning: unused structured binding declaration [-Wunused-variable]
   59 |     const auto& [u, v] = edge[i];
      |                 ^~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 0 ms 2524 KB Output is correct
26 Correct 0 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 0 ms 2396 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 0 ms 2524 KB Output is correct
26 Correct 0 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 0 ms 2396 KB Output is correct
29 Correct 1 ms 2392 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Correct 2 ms 2652 KB Output is correct
34 Correct 1 ms 2652 KB Output is correct
35 Correct 1 ms 2652 KB Output is correct
36 Correct 1 ms 2652 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 1 ms 2540 KB Output is correct
41 Correct 2 ms 2652 KB Output is correct
42 Correct 1 ms 2652 KB Output is correct
43 Correct 1 ms 2652 KB Output is correct
44 Correct 2 ms 2652 KB Output is correct
45 Correct 1 ms 2652 KB Output is correct
46 Correct 1 ms 2652 KB Output is correct
47 Correct 1 ms 2652 KB Output is correct
48 Correct 1 ms 2652 KB Output is correct
49 Correct 1 ms 2652 KB Output is correct
50 Correct 1 ms 2652 KB Output is correct
51 Correct 1 ms 2652 KB Output is correct
52 Correct 1 ms 2644 KB Output is correct
53 Correct 2 ms 2648 KB Output is correct
54 Correct 1 ms 2652 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 111 ms 12044 KB Output is correct
4 Correct 132 ms 10700 KB Output is correct
5 Correct 150 ms 10944 KB Output is correct
6 Correct 160 ms 12236 KB Output is correct
7 Correct 177 ms 11248 KB Output is correct
8 Correct 184 ms 11468 KB Output is correct
9 Correct 219 ms 11368 KB Output is correct
10 Correct 218 ms 10696 KB Output is correct
11 Correct 161 ms 11408 KB Output is correct
12 Correct 173 ms 11212 KB Output is correct
13 Correct 183 ms 10700 KB Output is correct
14 Correct 184 ms 12236 KB Output is correct
15 Correct 221 ms 11848 KB Output is correct
16 Correct 223 ms 10436 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 0 ms 2524 KB Output is correct
26 Correct 0 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 0 ms 2396 KB Output is correct
29 Correct 111 ms 12044 KB Output is correct
30 Correct 132 ms 10700 KB Output is correct
31 Correct 150 ms 10944 KB Output is correct
32 Correct 160 ms 12236 KB Output is correct
33 Correct 177 ms 11248 KB Output is correct
34 Correct 184 ms 11468 KB Output is correct
35 Correct 219 ms 11368 KB Output is correct
36 Correct 218 ms 10696 KB Output is correct
37 Correct 161 ms 11408 KB Output is correct
38 Correct 173 ms 11212 KB Output is correct
39 Correct 183 ms 10700 KB Output is correct
40 Correct 184 ms 12236 KB Output is correct
41 Correct 221 ms 11848 KB Output is correct
42 Correct 223 ms 10436 KB Output is correct
43 Correct 130 ms 10576 KB Output is correct
44 Correct 132 ms 10692 KB Output is correct
45 Correct 171 ms 12224 KB Output is correct
46 Correct 161 ms 12232 KB Output is correct
47 Correct 205 ms 11468 KB Output is correct
48 Correct 206 ms 11980 KB Output is correct
49 Correct 225 ms 11720 KB Output is correct
50 Correct 161 ms 10436 KB Output is correct
51 Correct 168 ms 12228 KB Output is correct
52 Correct 167 ms 12272 KB Output is correct
53 Correct 182 ms 10444 KB Output is correct
54 Correct 213 ms 10688 KB Output is correct
55 Correct 216 ms 12236 KB Output is correct
56 Correct 220 ms 10944 KB Output is correct

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 0 ms 2524 KB Output is correct
26 Correct 0 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 0 ms 2396 KB Output is correct
29 Correct 1 ms 2392 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Correct 2 ms 2652 KB Output is correct
34 Correct 1 ms 2652 KB Output is correct
35 Correct 1 ms 2652 KB Output is correct
36 Correct 1 ms 2652 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 1 ms 2540 KB Output is correct
41 Correct 2 ms 2652 KB Output is correct
42 Correct 1 ms 2652 KB Output is correct
43 Correct 1 ms 2652 KB Output is correct
44 Correct 2 ms 2652 KB Output is correct
45 Correct 1 ms 2652 KB Output is correct
46 Correct 1 ms 2652 KB Output is correct
47 Correct 1 ms 2652 KB Output is correct
48 Correct 1 ms 2652 KB Output is correct
49 Correct 1 ms 2652 KB Output is correct
50 Correct 1 ms 2652 KB Output is correct
51 Correct 1 ms 2652 KB Output is correct
52 Correct 1 ms 2644 KB Output is correct
53 Correct 2 ms 2648 KB Output is correct
54 Correct 1 ms 2652 KB Output is correct
55 Correct 94 ms 10432 KB Output is correct
56 Correct 111 ms 10444 KB Output is correct
57 Correct 129 ms 11456 KB Output is correct
58 Correct 142 ms 10444 KB Output is correct
59 Correct 187 ms 10432 KB Output is correct
60 Correct 201 ms 11972 KB Output is correct
61 Correct 149 ms 10956 KB Output is correct
62 Correct 185 ms 12476 KB Output is correct
63 Correct 155 ms 12232 KB Output is correct
64 Correct 190 ms 11208 KB Output is correct
65 Correct 199 ms 11212 KB Output is correct

Subtask #6
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 0 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct
17 Correct 0 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 0 ms 2396 KB Output is correct
20 Correct 0 ms 2396 KB Output is correct
21 Correct 0 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 0 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 0 ms 2524 KB Output is correct
26 Correct 0 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 0 ms 2396 KB Output is correct
29 Correct 1 ms 2392 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2652 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Correct 2 ms 2652 KB Output is correct
34 Correct 1 ms 2652 KB Output is correct
35 Correct 1 ms 2652 KB Output is correct
36 Correct 1 ms 2652 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 1 ms 2652 KB Output is correct
40 Correct 1 ms 2540 KB Output is correct
41 Correct 2 ms 2652 KB Output is correct
42 Correct 1 ms 2652 KB Output is correct
43 Correct 1 ms 2652 KB Output is correct
44 Correct 2 ms 2652 KB Output is correct
45 Correct 1 ms 2652 KB Output is correct
46 Correct 1 ms 2652 KB Output is correct
47 Correct 1 ms 2652 KB Output is correct
48 Correct 1 ms 2652 KB Output is correct
49 Correct 1 ms 2652 KB Output is correct
50 Correct 1 ms 2652 KB Output is correct
51 Correct 1 ms 2652 KB Output is correct
52 Correct 1 ms 2644 KB Output is correct
53 Correct 2 ms 2648 KB Output is correct
54 Correct 1 ms 2652 KB Output is correct
55 Correct 111 ms 12044 KB Output is correct
56 Correct 132 ms 10700 KB Output is correct
57 Correct 150 ms 10944 KB Output is correct
58 Correct 160 ms 12236 KB Output is correct
59 Correct 177 ms 11248 KB Output is correct
60 Correct 184 ms 11468 KB Output is correct
61 Correct 219 ms 11368 KB Output is correct
62 Correct 218 ms 10696 KB Output is correct
63 Correct 161 ms 11408 KB Output is correct
64 Correct 173 ms 11212 KB Output is correct
65 Correct 183 ms 10700 KB Output is correct
66 Correct 184 ms 12236 KB Output is correct
67 Correct 221 ms 11848 KB Output is correct
68 Correct 223 ms 10436 KB Output is correct
69 Correct 130 ms 10576 KB Output is correct
70 Correct 132 ms 10692 KB Output is correct
71 Correct 171 ms 12224 KB Output is correct
72 Correct 161 ms 12232 KB Output is correct
73 Correct 205 ms 11468 KB Output is correct
74 Correct 206 ms 11980 KB Output is correct
75 Correct 225 ms 11720 KB Output is correct
76 Correct 161 ms 10436 KB Output is correct
77 Correct 168 ms 12228 KB Output is correct
78 Correct 167 ms 12272 KB Output is correct
79 Correct 182 ms 10444 KB Output is correct
80 Correct 213 ms 10688 KB Output is correct
81 Correct 216 ms 12236 KB Output is correct
82 Correct 220 ms 10944 KB Output is correct
83 Correct 94 ms 10432 KB Output is correct
84 Correct 111 ms 10444 KB Output is correct
85 Correct 129 ms 11456 KB Output is correct
86 Correct 142 ms 10444 KB Output is correct
87 Correct 187 ms 10432 KB Output is correct
88 Correct 201 ms 11972 KB Output is correct
89 Correct 149 ms 10956 KB Output is correct
90 Correct 185 ms 12476 KB Output is correct
91 Correct 155 ms 12232 KB Output is correct
92 Correct 190 ms 11208 KB Output is correct
93 Correct 199 ms 11212 KB Output is correct
94 Correct 112 ms 11212 KB Output is correct
95 Correct 152 ms 10944 KB Output is correct
96 Correct 156 ms 11980 KB Output is correct
97 Correct 173 ms 11716 KB Output is correct
98 Correct 184 ms 11724 KB Output is correct
99 Correct 190 ms 11708 KB Output is correct
100 Correct 239 ms 12128 KB Output is correct
101 Correct 163 ms 10736 KB Output is correct
102 Correct 195 ms 11712 KB Output is correct
103 Correct 193 ms 11976 KB Output is correct
104 Correct 191 ms 10948 KB Output is correct
105 Correct 215 ms 11724 KB Output is correct
106 Correct 236 ms 11464 KB Output is correct
107 Correct 82 ms 11724 KB Output is correct
108 Correct 111 ms 11468 KB Output is correct
109 Correct 110 ms 10440 KB Output is correct
110 Correct 111 ms 10692 KB Output is correct
111 Correct 134 ms 10688 KB Output is correct
112 Correct 134 ms 10768 KB Output is correct
113 Correct 112 ms 11212 KB Output is correct
114 Correct 114 ms 10672 KB Output is correct
115 Correct 110 ms 10436 KB Output is correct
116 Correct 111 ms 12236 KB Output is correct