oj.uz

Submission #1083592

# Submission time Handle Problem Language Result Execution time Memory
1083592 2024-09-03T14:38:28 Z Master Joker (BOI20_joker) C++17
100 / 100
 291 ms 14768 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 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 1112 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 0 ms 1116 KB Output is correct
4 Correct 0 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1280 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 1 ms 1112 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1116 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1112 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1112 KB Output is correct
16 Correct 1 ms 1128 KB Output is correct
17 Correct 1 ms 1116 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 1 ms 1116 KB Output is correct
24 Correct 1 ms 1116 KB Output is correct
25 Correct 1 ms 1116 KB Output is correct
26 Correct 1 ms 1116 KB Output is correct
27 Correct 1 ms 1116 KB Output is correct
28 Correct 1 ms 1116 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 0 ms 1116 KB Output is correct
4 Correct 0 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1280 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 1 ms 1112 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1116 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1112 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1112 KB Output is correct
16 Correct 1 ms 1128 KB Output is correct
17 Correct 1 ms 1116 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 1 ms 1116 KB Output is correct
24 Correct 1 ms 1116 KB Output is correct
25 Correct 1 ms 1116 KB Output is correct
26 Correct 1 ms 1116 KB Output is correct
27 Correct 1 ms 1116 KB Output is correct
28 Correct 1 ms 1116 KB Output is correct
29 Correct 2 ms 1116 KB Output is correct
30 Correct 2 ms 1368 KB Output is correct
31 Correct 2 ms 1372 KB Output is correct
32 Correct 2 ms 1372 KB Output is correct
33 Correct 2 ms 1372 KB Output is correct
34 Correct 2 ms 1372 KB Output is correct
35 Correct 2 ms 1372 KB Output is correct
36 Correct 2 ms 1372 KB Output is correct
37 Correct 2 ms 1372 KB Output is correct
38 Correct 2 ms 1372 KB Output is correct
39 Correct 2 ms 1372 KB Output is correct
40 Correct 2 ms 1372 KB Output is correct
41 Correct 2 ms 1372 KB Output is correct
42 Correct 2 ms 1256 KB Output is correct
43 Correct 2 ms 1372 KB Output is correct
44 Correct 2 ms 1372 KB Output is correct
45 Correct 2 ms 1372 KB Output is correct
46 Correct 2 ms 1424 KB Output is correct
47 Correct 2 ms 1368 KB Output is correct
48 Correct 2 ms 1372 KB Output is correct
49 Correct 2 ms 1368 KB Output is correct
50 Correct 2 ms 1296 KB Output is correct
51 Correct 2 ms 1372 KB Output is correct
52 Correct 2 ms 1372 KB Output is correct
53 Correct 2 ms 1372 KB Output is correct
54 Correct 2 ms 1372 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 133 ms 13096 KB Output is correct
4 Correct 166 ms 11992 KB Output is correct
5 Correct 185 ms 13420 KB Output is correct
6 Correct 203 ms 12984 KB Output is correct
7 Correct 224 ms 13232 KB Output is correct
8 Correct 219 ms 12512 KB Output is correct
9 Correct 245 ms 12472 KB Output is correct
10 Correct 275 ms 12824 KB Output is correct
11 Correct 196 ms 12980 KB Output is correct
12 Correct 222 ms 13232 KB Output is correct
13 Correct 215 ms 12912 KB Output is correct
14 Correct 224 ms 12976 KB Output is correct
15 Correct 273 ms 13196 KB Output is correct
16 Correct 279 ms 13240 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 0 ms 1116 KB Output is correct
4 Correct 0 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1280 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 1 ms 1112 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1116 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1112 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1112 KB Output is correct
16 Correct 1 ms 1128 KB Output is correct
17 Correct 1 ms 1116 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 1 ms 1116 KB Output is correct
24 Correct 1 ms 1116 KB Output is correct
25 Correct 1 ms 1116 KB Output is correct
26 Correct 1 ms 1116 KB Output is correct
27 Correct 1 ms 1116 KB Output is correct
28 Correct 1 ms 1116 KB Output is correct
29 Correct 133 ms 13096 KB Output is correct
30 Correct 166 ms 11992 KB Output is correct
31 Correct 185 ms 13420 KB Output is correct
32 Correct 203 ms 12984 KB Output is correct
33 Correct 224 ms 13232 KB Output is correct
34 Correct 219 ms 12512 KB Output is correct
35 Correct 245 ms 12472 KB Output is correct
36 Correct 275 ms 12824 KB Output is correct
37 Correct 196 ms 12980 KB Output is correct
38 Correct 222 ms 13232 KB Output is correct
39 Correct 215 ms 12912 KB Output is correct
40 Correct 224 ms 12976 KB Output is correct
41 Correct 273 ms 13196 KB Output is correct
42 Correct 279 ms 13240 KB Output is correct
43 Correct 145 ms 13240 KB Output is correct
44 Correct 161 ms 12464 KB Output is correct
45 Correct 200 ms 13612 KB Output is correct
46 Correct 201 ms 13492 KB Output is correct
47 Correct 218 ms 13376 KB Output is correct
48 Correct 256 ms 12976 KB Output is correct
49 Correct 273 ms 13376 KB Output is correct
50 Correct 198 ms 13232 KB Output is correct
51 Correct 207 ms 13480 KB Output is correct
52 Correct 203 ms 13488 KB Output is correct
53 Correct 219 ms 12980 KB Output is correct
54 Correct 239 ms 13232 KB Output is correct
55 Correct 260 ms 13608 KB Output is correct
56 Correct 291 ms 13488 KB Output is correct

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 0 ms 1116 KB Output is correct
4 Correct 0 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1280 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 1 ms 1112 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1116 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1112 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1112 KB Output is correct
16 Correct 1 ms 1128 KB Output is correct
17 Correct 1 ms 1116 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 1 ms 1116 KB Output is correct
24 Correct 1 ms 1116 KB Output is correct
25 Correct 1 ms 1116 KB Output is correct
26 Correct 1 ms 1116 KB Output is correct
27 Correct 1 ms 1116 KB Output is correct
28 Correct 1 ms 1116 KB Output is correct
29 Correct 2 ms 1116 KB Output is correct
30 Correct 2 ms 1368 KB Output is correct
31 Correct 2 ms 1372 KB Output is correct
32 Correct 2 ms 1372 KB Output is correct
33 Correct 2 ms 1372 KB Output is correct
34 Correct 2 ms 1372 KB Output is correct
35 Correct 2 ms 1372 KB Output is correct
36 Correct 2 ms 1372 KB Output is correct
37 Correct 2 ms 1372 KB Output is correct
38 Correct 2 ms 1372 KB Output is correct
39 Correct 2 ms 1372 KB Output is correct
40 Correct 2 ms 1372 KB Output is correct
41 Correct 2 ms 1372 KB Output is correct
42 Correct 2 ms 1256 KB Output is correct
43 Correct 2 ms 1372 KB Output is correct
44 Correct 2 ms 1372 KB Output is correct
45 Correct 2 ms 1372 KB Output is correct
46 Correct 2 ms 1424 KB Output is correct
47 Correct 2 ms 1368 KB Output is correct
48 Correct 2 ms 1372 KB Output is correct
49 Correct 2 ms 1368 KB Output is correct
50 Correct 2 ms 1296 KB Output is correct
51 Correct 2 ms 1372 KB Output is correct
52 Correct 2 ms 1372 KB Output is correct
53 Correct 2 ms 1372 KB Output is correct
54 Correct 2 ms 1372 KB Output is correct
55 Correct 111 ms 11348 KB Output is correct
56 Correct 132 ms 11716 KB Output is correct
57 Correct 163 ms 11724 KB Output is correct
58 Correct 172 ms 11364 KB Output is correct
59 Correct 223 ms 11468 KB Output is correct
60 Correct 251 ms 11716 KB Output is correct
61 Correct 178 ms 11500 KB Output is correct
62 Correct 194 ms 11712 KB Output is correct
63 Correct 189 ms 11200 KB Output is correct
64 Correct 238 ms 11460 KB Output is correct
65 Correct 254 ms 11712 KB Output is correct

Subtask #6
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 0 ms 1116 KB Output is correct
4 Correct 0 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1280 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 1 ms 1112 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1116 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1112 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1112 KB Output is correct
16 Correct 1 ms 1128 KB Output is correct
17 Correct 1 ms 1116 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 1 ms 1116 KB Output is correct
24 Correct 1 ms 1116 KB Output is correct
25 Correct 1 ms 1116 KB Output is correct
26 Correct 1 ms 1116 KB Output is correct
27 Correct 1 ms 1116 KB Output is correct
28 Correct 1 ms 1116 KB Output is correct
29 Correct 2 ms 1116 KB Output is correct
30 Correct 2 ms 1368 KB Output is correct
31 Correct 2 ms 1372 KB Output is correct
32 Correct 2 ms 1372 KB Output is correct
33 Correct 2 ms 1372 KB Output is correct
34 Correct 2 ms 1372 KB Output is correct
35 Correct 2 ms 1372 KB Output is correct
36 Correct 2 ms 1372 KB Output is correct
37 Correct 2 ms 1372 KB Output is correct
38 Correct 2 ms 1372 KB Output is correct
39 Correct 2 ms 1372 KB Output is correct
40 Correct 2 ms 1372 KB Output is correct
41 Correct 2 ms 1372 KB Output is correct
42 Correct 2 ms 1256 KB Output is correct
43 Correct 2 ms 1372 KB Output is correct
44 Correct 2 ms 1372 KB Output is correct
45 Correct 2 ms 1372 KB Output is correct
46 Correct 2 ms 1424 KB Output is correct
47 Correct 2 ms 1368 KB Output is correct
48 Correct 2 ms 1372 KB Output is correct
49 Correct 2 ms 1368 KB Output is correct
50 Correct 2 ms 1296 KB Output is correct
51 Correct 2 ms 1372 KB Output is correct
52 Correct 2 ms 1372 KB Output is correct
53 Correct 2 ms 1372 KB Output is correct
54 Correct 2 ms 1372 KB Output is correct
55 Correct 133 ms 13096 KB Output is correct
56 Correct 166 ms 11992 KB Output is correct
57 Correct 185 ms 13420 KB Output is correct
58 Correct 203 ms 12984 KB Output is correct
59 Correct 224 ms 13232 KB Output is correct
60 Correct 219 ms 12512 KB Output is correct
61 Correct 245 ms 12472 KB Output is correct
62 Correct 275 ms 12824 KB Output is correct
63 Correct 196 ms 12980 KB Output is correct
64 Correct 222 ms 13232 KB Output is correct
65 Correct 215 ms 12912 KB Output is correct
66 Correct 224 ms 12976 KB Output is correct
67 Correct 273 ms 13196 KB Output is correct
68 Correct 279 ms 13240 KB Output is correct
69 Correct 145 ms 13240 KB Output is correct
70 Correct 161 ms 12464 KB Output is correct
71 Correct 200 ms 13612 KB Output is correct
72 Correct 201 ms 13492 KB Output is correct
73 Correct 218 ms 13376 KB Output is correct
74 Correct 256 ms 12976 KB Output is correct
75 Correct 273 ms 13376 KB Output is correct
76 Correct 198 ms 13232 KB Output is correct
77 Correct 207 ms 13480 KB Output is correct
78 Correct 203 ms 13488 KB Output is correct
79 Correct 219 ms 12980 KB Output is correct
80 Correct 239 ms 13232 KB Output is correct
81 Correct 260 ms 13608 KB Output is correct
82 Correct 291 ms 13488 KB Output is correct
83 Correct 111 ms 11348 KB Output is correct
84 Correct 132 ms 11716 KB Output is correct
85 Correct 163 ms 11724 KB Output is correct
86 Correct 172 ms 11364 KB Output is correct
87 Correct 223 ms 11468 KB Output is correct
88 Correct 251 ms 11716 KB Output is correct
89 Correct 178 ms 11500 KB Output is correct
90 Correct 194 ms 11712 KB Output is correct
91 Correct 189 ms 11200 KB Output is correct
92 Correct 238 ms 11460 KB Output is correct
93 Correct 254 ms 11712 KB Output is correct
94 Correct 137 ms 14068 KB Output is correct
95 Correct 181 ms 14256 KB Output is correct
96 Correct 192 ms 14256 KB Output is correct
97 Correct 206 ms 14160 KB Output is correct
98 Correct 221 ms 14080 KB Output is correct
99 Correct 241 ms 14000 KB Output is correct
100 Correct 259 ms 14340 KB Output is correct
101 Correct 197 ms 13980 KB Output is correct
102 Correct 219 ms 14300 KB Output is correct
103 Correct 244 ms 14256 KB Output is correct
104 Correct 214 ms 13964 KB Output is correct
105 Correct 250 ms 14260 KB Output is correct
106 Correct 283 ms 14256 KB Output is correct
107 Correct 103 ms 14768 KB Output is correct
108 Correct 150 ms 13748 KB Output is correct
109 Correct 134 ms 13956 KB Output is correct
110 Correct 132 ms 13900 KB Output is correct
111 Correct 137 ms 13812 KB Output is correct
112 Correct 135 ms 13744 KB Output is correct
113 Correct 134 ms 13748 KB Output is correct
114 Correct 133 ms 13904 KB Output is correct
115 Correct 134 ms 13744 KB Output is correct
116 Correct 130 ms 13884 KB Output is correct