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Submission #1033822

# Submission time Handle Problem Language Result Execution time Memory
1033822 2024-07-25T06:45:23 Z 정민찬(#10972) Fire (BOI24_fire) C++17
53 / 100
 208 ms 59984 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;

struct SegmentTree{
    vector<int> tree;
    void init(int n) {
        int sz = 1 << __lg(n-1) + 2;
        tree.assign(sz, -1);
    }
    void update(int node, int s, int e, int tar, int val) {
        if (s > tar || tar > e) return;
        if (s == e) {
            tree[node] = val;
            return;
        }
        int mid = s + e >> 1;
        update(node*2, s, mid, tar, val);
        update(node*2+1, mid+1, e, tar, val);
        tree[node] = max(tree[node*2], tree[node*2+1]);
    }
    int query(int node, int s, int e, int l, int r) {
        if (l > e || s > r) return -1;
        if (l <= s && e <= r) return tree[node];
        int mid = s + e >> 1;
        return max(query(node*2, s, mid, l, r), query(node*2+1, mid+1, e, l, r));
    }
};

SegmentTree seg;

int main() {
    ios_base :: sync_with_stdio(false); cin.tie(NULL);
    int n, m;
    cin >> n >> m;
    vector<pair<int,int>> a(n);
    for (int i=0; i<n; i++) {
        cin >> a[i].first >> a[i].second;
        if (a[i].first > a[i].second) a[i].second += m;
    }
    sort(a.begin(), a.end(), [&] (pair<int,int> &u, pair<int,int> &v) {
        if (u.first == v.first) return u.second > v.second;
        return u.first < v.first;
    });
    vector<pair<int,int>> t = {a[0]};
    int mx = a[0].second;
    for (int i=1; i<n; i++) {
        if (a[i].second > mx) {
            t.push_back(a[i]);
            mx = a[i].second;
        }
    }
    a.clear();
    for (int i=0; i<t.size(); i++) {
        if (t[i].second > mx - m)
            a.push_back(t[i]);
    }
    n = a.size();
    vector<int> d;
    for (int i=0; i<n; i++) {
        d.push_back(a[i].first);
        d.push_back(a[i].second);
    }
    sort(d.begin(), d.end());
    d.erase(unique(d.begin(), d.end()), d.end());
    for (int i=0; i<n; i++) {
        a[i].first = lower_bound(d.begin(), d.end(), a[i].first) - d.begin() + 1;
        a[i].second = lower_bound(d.begin(), d.end(), a[i].second) - d.begin() + 1;
    }
    int M = d.size();
    seg.init(M);
    for (int i=0; i<n; i++) {
        seg.update(1, 1, M, a[i].first, i);
    }
    vector<vector<int>> r(n, vector<int>(20)), cnt(n, vector<int>(20));
    for (int i=0; i<n; i++) {
        if (d[a[i].second-1] >= m) {
            int idx = upper_bound(d.begin(), d.end(), d[a[i].second-1] - m) - d.begin();
            r[i][0] = seg.query(1, 1, M, 1, idx);
            if (r[i][0] == -1) {
                r[i][0] = seg.query(1, 1, M, a[i].first, M);
            }
        }
        else
            r[i][0] = seg.query(1, 1, M, a[i].first, a[i].second);
        if (r[i][0] == -1) r[i][0] = i;
        cnt[i][0] = (r[i][0] - i + n) % n;
    }
    for (int lv=1; lv<20; lv++) {
        for (int i=0; i<n; i++) {
            r[i][lv] = r[r[i][lv-1]][lv-1];
            cnt[i][lv] = cnt[i][lv-1] + cnt[r[i][lv-1]][lv-1];
        }
    }
    int ans = 1e9;
    for (int i=0; i<n; i++) {
        if (cnt[i][0] == 0) continue;
        int cur = 0;
        int x = i, y = 0;
        for (int lv=19; lv>=0; lv--) {
            if (y + cnt[x][lv] < n) {
                cur += (1 << lv);
                y += cnt[x][lv];
                x = r[x][lv];
            }
        }
        if (y + cnt[x][0] >= n)
            ans = min(ans, cur + 1);
    }
    if (ans > n) cout << "-1\n";
    else cout << ans << '\n';   
}

Compilation message

Main.cpp: In member function 'void SegmentTree::init(int)':
Main.cpp:11:33: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   11 |         int sz = 1 << __lg(n-1) + 2;
      |                       ~~~~~~~~~~^~~
Main.cpp: In member function 'void SegmentTree::update(int, int, int, int, int)':
Main.cpp:20:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   20 |         int mid = s + e >> 1;
      |                   ~~^~~
Main.cpp: In member function 'int SegmentTree::query(int, int, int, int, int)':
Main.cpp:28:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   28 |         int mid = s + e >> 1;
      |                   ~~^~~
Main.cpp: In function 'int main()':
Main.cpp:57:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for (int i=0; i<t.size(); i++) {
      |                   ~^~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 452 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 456 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 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 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 452 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 456 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 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 1 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 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 460 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 456 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 452 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 456 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 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 1 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 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 460 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 456 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 2 ms 604 KB Output is correct
40 Correct 4 ms 1628 KB Output is correct
41 Correct 4 ms 1884 KB Output is correct
42 Correct 4 ms 1624 KB Output is correct
43 Correct 2 ms 344 KB Output is correct
44 Correct 4 ms 1884 KB Output is correct
45 Correct 5 ms 1884 KB Output is correct
46 Correct 4 ms 1884 KB Output is correct
47 Correct 1 ms 600 KB Output is correct
48 Correct 1 ms 592 KB Output is correct
49 Correct 2 ms 1116 KB Output is correct
50 Correct 5 ms 1628 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 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 348 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 1 ms 348 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 4 ms 1884 KB Output is correct
16 Correct 4 ms 1628 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 4 ms 1880 KB Output is correct
19 Correct 3 ms 600 KB Output is correct
20 Correct 20 ms 2660 KB Output is correct
21 Correct 58 ms 12508 KB Output is correct
22 Correct 54 ms 10832 KB Output is correct
23 Correct 205 ms 56900 KB Output is correct
24 Correct 151 ms 48720 KB Output is correct
25 Correct 45 ms 5064 KB Output is correct
26 Correct 99 ms 32844 KB Output is correct
27 Correct 167 ms 57932 KB Output is correct
28 Correct 52 ms 9552 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 452 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 5 ms 1884 KB Output is correct
13 Correct 5 ms 1880 KB Output is correct
14 Correct 5 ms 1628 KB Output is correct
15 Correct 20 ms 2788 KB Output is correct
16 Correct 178 ms 56904 KB Output is correct
17 Correct 208 ms 59980 KB Output is correct
18 Incorrect 206 ms 59984 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 452 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 456 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 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 1 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 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 460 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 456 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 2 ms 604 KB Output is correct
40 Correct 4 ms 1628 KB Output is correct
41 Correct 4 ms 1884 KB Output is correct
42 Correct 4 ms 1624 KB Output is correct
43 Correct 2 ms 344 KB Output is correct
44 Correct 4 ms 1884 KB Output is correct
45 Correct 5 ms 1884 KB Output is correct
46 Correct 4 ms 1884 KB Output is correct
47 Correct 1 ms 600 KB Output is correct
48 Correct 1 ms 592 KB Output is correct
49 Correct 2 ms 1116 KB Output is correct
50 Correct 5 ms 1628 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 1 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 0 ms 460 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 4 ms 1884 KB Output is correct
66 Correct 4 ms 1628 KB Output is correct
67 Correct 1 ms 348 KB Output is correct
68 Correct 4 ms 1880 KB Output is correct
69 Correct 3 ms 600 KB Output is correct
70 Correct 20 ms 2660 KB Output is correct
71 Correct 58 ms 12508 KB Output is correct
72 Correct 54 ms 10832 KB Output is correct
73 Correct 205 ms 56900 KB Output is correct
74 Correct 151 ms 48720 KB Output is correct
75 Correct 45 ms 5064 KB Output is correct
76 Correct 99 ms 32844 KB Output is correct
77 Correct 167 ms 57932 KB Output is correct
78 Correct 52 ms 9552 KB Output is correct
79 Correct 1 ms 348 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 1 ms 348 KB Output is correct
82 Correct 1 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 1 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 1 ms 348 KB Output is correct
87 Correct 1 ms 452 KB Output is correct
88 Correct 0 ms 348 KB Output is correct
89 Correct 1 ms 348 KB Output is correct
90 Correct 5 ms 1884 KB Output is correct
91 Correct 5 ms 1880 KB Output is correct
92 Correct 5 ms 1628 KB Output is correct
93 Correct 20 ms 2788 KB Output is correct
94 Correct 178 ms 56904 KB Output is correct
95 Correct 208 ms 59980 KB Output is correct
96 Incorrect 206 ms 59984 KB Output isn't correct
97 Halted 0 ms 0 KB -