oj.uz

Submission #1093473

# Submission time Handle Problem Language Result Execution time Memory
1093473 2024-09-27T00:39:00 Z duckindog Joker (BOI20_joker) C++17
100 / 100
 285 ms 14564 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 1 ms 1116 KB Output is correct
5 Correct 0 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1112 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 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 1116 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 1112 KB Output is correct
25 Correct 1 ms 1112 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 1 ms 1116 KB Output is correct
5 Correct 0 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1112 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 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 1116 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 1112 KB Output is correct
25 Correct 1 ms 1112 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 1372 KB Output is correct
31 Correct 2 ms 1292 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 1428 KB Output is correct
35 Correct 2 ms 1372 KB Output is correct
36 Correct 1 ms 1368 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 1368 KB Output is correct
40 Correct 2 ms 1368 KB Output is correct
41 Correct 2 ms 1372 KB Output is correct
42 Correct 2 ms 1372 KB Output is correct
43 Correct 2 ms 1372 KB Output is correct
44 Correct 2 ms 1372 KB Output is correct
45 Correct 3 ms 1372 KB Output is correct
46 Correct 2 ms 1368 KB Output is correct
47 Correct 2 ms 1372 KB Output is correct
48 Correct 2 ms 1372 KB Output is correct
49 Correct 2 ms 1372 KB Output is correct
50 Correct 2 ms 1372 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 128 ms 12980 KB Output is correct
4 Correct 163 ms 11980 KB Output is correct
5 Correct 188 ms 13232 KB Output is correct
6 Correct 188 ms 12948 KB Output is correct
7 Correct 215 ms 12980 KB Output is correct
8 Correct 214 ms 12484 KB Output is correct
9 Correct 236 ms 12608 KB Output is correct
10 Correct 278 ms 12720 KB Output is correct
11 Correct 195 ms 12980 KB Output is correct
12 Correct 223 ms 13316 KB Output is correct
13 Correct 219 ms 12848 KB Output is correct
14 Correct 217 ms 12976 KB Output is correct
15 Correct 271 ms 12968 KB Output is correct
16 Correct 271 ms 13232 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 1 ms 1116 KB Output is correct
5 Correct 0 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1112 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 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 1116 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 1112 KB Output is correct
25 Correct 1 ms 1112 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 128 ms 12980 KB Output is correct
30 Correct 163 ms 11980 KB Output is correct
31 Correct 188 ms 13232 KB Output is correct
32 Correct 188 ms 12948 KB Output is correct
33 Correct 215 ms 12980 KB Output is correct
34 Correct 214 ms 12484 KB Output is correct
35 Correct 236 ms 12608 KB Output is correct
36 Correct 278 ms 12720 KB Output is correct
37 Correct 195 ms 12980 KB Output is correct
38 Correct 223 ms 13316 KB Output is correct
39 Correct 219 ms 12848 KB Output is correct
40 Correct 217 ms 12976 KB Output is correct
41 Correct 271 ms 12968 KB Output is correct
42 Correct 271 ms 13232 KB Output is correct
43 Correct 133 ms 13232 KB Output is correct
44 Correct 166 ms 12468 KB Output is correct
45 Correct 214 ms 13492 KB Output is correct
46 Correct 206 ms 13480 KB Output is correct
47 Correct 228 ms 13376 KB Output is correct
48 Correct 262 ms 12976 KB Output is correct
49 Correct 285 ms 13372 KB Output is correct
50 Correct 206 ms 13244 KB Output is correct
51 Correct 235 ms 13368 KB Output is correct
52 Correct 229 ms 13400 KB Output is correct
53 Correct 216 ms 13060 KB Output is correct
54 Correct 255 ms 13232 KB Output is correct
55 Correct 260 ms 13492 KB Output is correct
56 Correct 281 ms 13492 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 1 ms 1116 KB Output is correct
5 Correct 0 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1112 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 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 1116 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 1112 KB Output is correct
25 Correct 1 ms 1112 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 1372 KB Output is correct
31 Correct 2 ms 1292 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 1428 KB Output is correct
35 Correct 2 ms 1372 KB Output is correct
36 Correct 1 ms 1368 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 1368 KB Output is correct
40 Correct 2 ms 1368 KB Output is correct
41 Correct 2 ms 1372 KB Output is correct
42 Correct 2 ms 1372 KB Output is correct
43 Correct 2 ms 1372 KB Output is correct
44 Correct 2 ms 1372 KB Output is correct
45 Correct 3 ms 1372 KB Output is correct
46 Correct 2 ms 1368 KB Output is correct
47 Correct 2 ms 1372 KB Output is correct
48 Correct 2 ms 1372 KB Output is correct
49 Correct 2 ms 1372 KB Output is correct
50 Correct 2 ms 1372 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 137 ms 11456 KB Output is correct
56 Correct 138 ms 11716 KB Output is correct
57 Correct 159 ms 11716 KB Output is correct
58 Correct 169 ms 11460 KB Output is correct
59 Correct 224 ms 11428 KB Output is correct
60 Correct 246 ms 11724 KB Output is correct
61 Correct 176 ms 11456 KB Output is correct
62 Correct 198 ms 11716 KB Output is correct
63 Correct 186 ms 11204 KB Output is correct
64 Correct 241 ms 11456 KB Output is correct
65 Correct 249 ms 11716 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 1 ms 1116 KB Output is correct
5 Correct 0 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 1 ms 1116 KB Output is correct
11 Correct 1 ms 1112 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 1 ms 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 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 1116 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 1112 KB Output is correct
25 Correct 1 ms 1112 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 1372 KB Output is correct
31 Correct 2 ms 1292 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 1428 KB Output is correct
35 Correct 2 ms 1372 KB Output is correct
36 Correct 1 ms 1368 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 1368 KB Output is correct
40 Correct 2 ms 1368 KB Output is correct
41 Correct 2 ms 1372 KB Output is correct
42 Correct 2 ms 1372 KB Output is correct
43 Correct 2 ms 1372 KB Output is correct
44 Correct 2 ms 1372 KB Output is correct
45 Correct 3 ms 1372 KB Output is correct
46 Correct 2 ms 1368 KB Output is correct
47 Correct 2 ms 1372 KB Output is correct
48 Correct 2 ms 1372 KB Output is correct
49 Correct 2 ms 1372 KB Output is correct
50 Correct 2 ms 1372 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 128 ms 12980 KB Output is correct
56 Correct 163 ms 11980 KB Output is correct
57 Correct 188 ms 13232 KB Output is correct
58 Correct 188 ms 12948 KB Output is correct
59 Correct 215 ms 12980 KB Output is correct
60 Correct 214 ms 12484 KB Output is correct
61 Correct 236 ms 12608 KB Output is correct
62 Correct 278 ms 12720 KB Output is correct
63 Correct 195 ms 12980 KB Output is correct
64 Correct 223 ms 13316 KB Output is correct
65 Correct 219 ms 12848 KB Output is correct
66 Correct 217 ms 12976 KB Output is correct
67 Correct 271 ms 12968 KB Output is correct
68 Correct 271 ms 13232 KB Output is correct
69 Correct 133 ms 13232 KB Output is correct
70 Correct 166 ms 12468 KB Output is correct
71 Correct 214 ms 13492 KB Output is correct
72 Correct 206 ms 13480 KB Output is correct
73 Correct 228 ms 13376 KB Output is correct
74 Correct 262 ms 12976 KB Output is correct
75 Correct 285 ms 13372 KB Output is correct
76 Correct 206 ms 13244 KB Output is correct
77 Correct 235 ms 13368 KB Output is correct
78 Correct 229 ms 13400 KB Output is correct
79 Correct 216 ms 13060 KB Output is correct
80 Correct 255 ms 13232 KB Output is correct
81 Correct 260 ms 13492 KB Output is correct
82 Correct 281 ms 13492 KB Output is correct
83 Correct 137 ms 11456 KB Output is correct
84 Correct 138 ms 11716 KB Output is correct
85 Correct 159 ms 11716 KB Output is correct
86 Correct 169 ms 11460 KB Output is correct
87 Correct 224 ms 11428 KB Output is correct
88 Correct 246 ms 11724 KB Output is correct
89 Correct 176 ms 11456 KB Output is correct
90 Correct 198 ms 11716 KB Output is correct
91 Correct 186 ms 11204 KB Output is correct
92 Correct 241 ms 11456 KB Output is correct
93 Correct 249 ms 11716 KB Output is correct
94 Correct 137 ms 14008 KB Output is correct
95 Correct 190 ms 14256 KB Output is correct
96 Correct 190 ms 14188 KB Output is correct
97 Correct 203 ms 13928 KB Output is correct
98 Correct 225 ms 14004 KB Output is correct
99 Correct 225 ms 13916 KB Output is correct
100 Correct 263 ms 14260 KB Output is correct
101 Correct 194 ms 13972 KB Output is correct
102 Correct 217 ms 14260 KB Output is correct
103 Correct 237 ms 14256 KB Output is correct
104 Correct 220 ms 13872 KB Output is correct
105 Correct 261 ms 14260 KB Output is correct
106 Correct 276 ms 14264 KB Output is correct
107 Correct 98 ms 14564 KB Output is correct
108 Correct 134 ms 13748 KB Output is correct
109 Correct 132 ms 13744 KB Output is correct
110 Correct 130 ms 13748 KB Output is correct
111 Correct 137 ms 13844 KB Output is correct
112 Correct 132 ms 13748 KB Output is correct
113 Correct 130 ms 13752 KB Output is correct
114 Correct 134 ms 13744 KB Output is correct
115 Correct 130 ms 13760 KB Output is correct
116 Correct 132 ms 13744 KB Output is correct