oj.uz

Submission #1050409

# Submission time Handle Problem Language Result Execution time Memory
1050409 2024-08-09T09:13:29 Z duckindog Joker (BOI20_joker) C++17
14 / 100
 161 ms 604 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 2000 + 10;
int n, m, q;
vector<pair<int, int>> ad[N];
int co[N];

int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);

  cin >> n >> m >> q;
  for (int i = 1; i <= m; ++i) { 
    int u, v; cin >> u >> v;
    ad[u].push_back({v, i});
    ad[v].push_back({u, i});
  }

  auto color = [&](int st, int l, int r) { 
    bool ret = false;
    co[st] = 1;
    queue<int> q({st});
    while (q.size()) { 
      auto u = q.front(); q.pop();
      for (const auto& [v, id] : ad[u]) { 
        if (l <= id && id <= r) continue;
        if (co[v] == co[u]) return true;
        if (co[v]) continue;
        co[v] = co[u] ^ 3;
        q.push(v);
      }
    }
    return false;
  };
  auto cal = [&](int l, int r) { 
    memset(co, 0, sizeof co);
    for (int i = 1; i <= n; ++i) if (!co[i] && color(i, l, r)) return true;
    return false; 
  };

  if (n <= 2000 && q <= 2000) { 
    while (q--) { 
      int l, r; cin >> l >> r;
      cout << (cal(l, r) ? "YES" : "NO") << "\n";
    }
    return 0;
  }

  int l = 1, r = m, ma = -1;
  while (l <= r) { 
    int mid = l + r >> 1;
    if (cal(l, mid)) l = (ma = mid) + 1;
    else r = mid - 1;
  }

  while (q--) { 
    int l, r; cin >> l >> r;
    cout << (r <= ma ? "YES" : "NO") << "\n";
  }
}

Compilation message

Joker.cpp: In lambda function:
Joker.cpp:21:10: warning: unused variable 'ret' [-Wunused-variable]
   21 |     bool ret = false;
      |          ^~~
Joker.cpp: In function 'int32_t main()':
Joker.cpp:52:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   52 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 508 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 360 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 508 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 360 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 161 ms 348 KB Output is correct
30 Correct 77 ms 344 KB Output is correct
31 Correct 48 ms 344 KB Output is correct
32 Correct 20 ms 348 KB Output is correct
33 Correct 8 ms 348 KB Output is correct
34 Correct 53 ms 580 KB Output is correct
35 Correct 83 ms 584 KB Output is correct
36 Correct 23 ms 596 KB Output is correct
37 Correct 86 ms 348 KB Output is correct
38 Correct 51 ms 344 KB Output is correct
39 Correct 88 ms 348 KB Output is correct
40 Correct 29 ms 348 KB Output is correct
41 Correct 28 ms 592 KB Output is correct
42 Correct 32 ms 348 KB Output is correct
43 Correct 2 ms 344 KB Output is correct
44 Correct 3 ms 348 KB Output is correct
45 Correct 5 ms 348 KB Output is correct
46 Correct 12 ms 348 KB Output is correct
47 Correct 22 ms 348 KB Output is correct
48 Correct 24 ms 576 KB Output is correct
49 Correct 48 ms 588 KB Output is correct
50 Correct 71 ms 344 KB Output is correct
51 Correct 22 ms 344 KB Output is correct
52 Correct 32 ms 348 KB Output is correct
53 Correct 48 ms 348 KB Output is correct
54 Correct 75 ms 344 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Runtime error 1 ms 604 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 508 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 360 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Runtime error 1 ms 604 KB Execution killed with signal 11
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 508 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 360 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 161 ms 348 KB Output is correct
30 Correct 77 ms 344 KB Output is correct
31 Correct 48 ms 344 KB Output is correct
32 Correct 20 ms 348 KB Output is correct
33 Correct 8 ms 348 KB Output is correct
34 Correct 53 ms 580 KB Output is correct
35 Correct 83 ms 584 KB Output is correct
36 Correct 23 ms 596 KB Output is correct
37 Correct 86 ms 348 KB Output is correct
38 Correct 51 ms 344 KB Output is correct
39 Correct 88 ms 348 KB Output is correct
40 Correct 29 ms 348 KB Output is correct
41 Correct 28 ms 592 KB Output is correct
42 Correct 32 ms 348 KB Output is correct
43 Correct 2 ms 344 KB Output is correct
44 Correct 3 ms 348 KB Output is correct
45 Correct 5 ms 348 KB Output is correct
46 Correct 12 ms 348 KB Output is correct
47 Correct 22 ms 348 KB Output is correct
48 Correct 24 ms 576 KB Output is correct
49 Correct 48 ms 588 KB Output is correct
50 Correct 71 ms 344 KB Output is correct
51 Correct 22 ms 344 KB Output is correct
52 Correct 32 ms 348 KB Output is correct
53 Correct 48 ms 348 KB Output is correct
54 Correct 75 ms 344 KB Output is correct
55 Runtime error 1 ms 604 KB Execution killed with signal 11
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 508 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 360 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 161 ms 348 KB Output is correct
30 Correct 77 ms 344 KB Output is correct
31 Correct 48 ms 344 KB Output is correct
32 Correct 20 ms 348 KB Output is correct
33 Correct 8 ms 348 KB Output is correct
34 Correct 53 ms 580 KB Output is correct
35 Correct 83 ms 584 KB Output is correct
36 Correct 23 ms 596 KB Output is correct
37 Correct 86 ms 348 KB Output is correct
38 Correct 51 ms 344 KB Output is correct
39 Correct 88 ms 348 KB Output is correct
40 Correct 29 ms 348 KB Output is correct
41 Correct 28 ms 592 KB Output is correct
42 Correct 32 ms 348 KB Output is correct
43 Correct 2 ms 344 KB Output is correct
44 Correct 3 ms 348 KB Output is correct
45 Correct 5 ms 348 KB Output is correct
46 Correct 12 ms 348 KB Output is correct
47 Correct 22 ms 348 KB Output is correct
48 Correct 24 ms 576 KB Output is correct
49 Correct 48 ms 588 KB Output is correct
50 Correct 71 ms 344 KB Output is correct
51 Correct 22 ms 344 KB Output is correct
52 Correct 32 ms 348 KB Output is correct
53 Correct 48 ms 348 KB Output is correct
54 Correct 75 ms 344 KB Output is correct
55 Runtime error 1 ms 604 KB Execution killed with signal 11
56 Halted 0 ms 0 KB -