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답안 #993383

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
993383 2024-06-05T14:26:58 Z vladilius Fire (BOI24_fire) C++17
100 / 100
 165 ms 64076 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
#define ins insert

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n, m; cin>>n>>m;
    vector<int> l(n + 1), r(n + 1);
    for (int i = 1; i <= n; i++){
        cin>>l[i]>>r[i];
        if (!r[i]) r[i] = m;
        r[i]--;
        if (l[i] > r[i]){
            r[i] += m;
        }
    }
    
    vector<pii> all;
    for (int i = 1; i <= n; i++){
        all.pb({l[i], r[i]});
    }
    sort(all.begin(), all.end());
    vector<pii> tmp;
    int i = 0;
    while (i < n){
        int j = i;
        while (j < n && all[i].ff == all[j].ff){
            j++;
        }
        tmp.pb({all[j - 1].ss, all[j - 1].ff});
        i = j;
    }
    all = tmp;
    sort(all.begin(), all.end());
    tmp.clear();
    i = 0;
    while (i < all.size()){
        int j = i;
        while (j < all.size() && all[i].ff == all[j].ff){
            j++;
        }
        tmp.pb({all[i].ss, all[i].ff});
        i = j;
    }
    all = tmp;
    
    sort(all.begin(), all.end());
    n = (int) all.size();
    vector<int> log(n + 1);
    for (int i = 2; i <= n; i++){
        log[i] = log[i / 2] + 1;
    }
    const int lg = log[n];
    vector<vector<pii>> sp(n, vector<pii>(lg + 1));
    for (int i = 0; i < n; i++){
        sp[i][0] = {all[i].ss, i};
    }
    for (int k = 1; k <= lg; k++){
        for (int i = 0; i + (1 << k) <= n; i++){
            sp[i][k] = max(sp[i][k - 1], sp[i + (1 << (k - 1))][k - 1]);
        }
    }
    
    auto get = [&](int l, int r){
        int k = log[r - l + 1];
        return max(sp[l][k], sp[r - (1 << k) + 1][k]);
    };
    
    vector<int> ls;
    for (int i = 0; i < n; i++){
        ls.pb(all[i].ff);
    }
    vector<int> :: iterator it1, it2;
    
    vector<int> g(n);
    for (int i = 0; i < n; i++){
        auto &[l, r] = all[i];
        it1 = lower_bound(ls.begin(), ls.end(), l);
        it2 = upper_bound(ls.begin(), ls.end(), r + 1); it2--;
        int lb = max(i + 1, (int) (it1 - ls.begin())), rb = (int) (it2 - ls.begin());
        if (lb > rb){
            g[i] = -1;
            continue;
        }
        g[i] = get(lb, rb).ss;
        if (all[g[i]].ss <= r) g[i] = -1;
    }
    
    vector<vector<int>> pw(n, vector<int>(lg + 1, -1));
    for (int i = 0; i < n; i++){
        pw[i][0] = g[i];
    }
    for (int k = 1; k <= lg; k++){
        for (int i = 0; i + (1 << k) <= n; i++){
            if (pw[i][k - 1] == -1) continue;
            pw[i][k] = pw[pw[i][k - 1]][k - 1];
        }
    }
    
    int ans = n + 1;
    for (int i = 0; i < n; i++){
        int rr = all[i].ff + m - 1, j = i, out = 1;
        for (int k = lg; k >= 0; k--){
            int v = pw[j][k];
            if (v != -1 && all[v].ss <= rr){
                j = v;
                out += (1 << k);
            }
        }
        while (j != -1 && all[j].ss < rr){
            j = g[j]; out++;
        }
        if (j != -1) ans = min(ans, out);
    }
    cout<<((ans > n) ? -1 : ans)<<"\n";
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:45:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     while (i < all.size()){
      |            ~~^~~~~~~~~~~~
Main.cpp:47:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         while (j < all.size() && all[i].ff == all[j].ff){
      |                ~~^~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 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 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 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 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 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 1 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 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 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 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 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 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 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 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 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 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 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 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 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 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 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 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 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 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 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 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 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 3 ms 1628 KB Output is correct
40 Correct 3 ms 1628 KB Output is correct
41 Correct 3 ms 1628 KB Output is correct
42 Correct 3 ms 1628 KB Output is correct
43 Correct 3 ms 1116 KB Output is correct
44 Correct 3 ms 1624 KB Output is correct
45 Correct 3 ms 1628 KB Output is correct
46 Correct 3 ms 1524 KB Output is correct
47 Correct 3 ms 1624 KB Output is correct
48 Correct 3 ms 1628 KB Output is correct
49 Correct 3 ms 1624 KB Output is correct
50 Correct 3 ms 1628 KB Output is correct

Subtask #4
13.0 / 13.0

# 결과 실행 시간 메모리 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 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 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 348 KB Output is correct
15 Correct 3 ms 1628 KB Output is correct
16 Correct 3 ms 1628 KB Output is correct
17 Correct 3 ms 1116 KB Output is correct
18 Correct 4 ms 1628 KB Output is correct
19 Correct 3 ms 1628 KB Output is correct
20 Correct 23 ms 4212 KB Output is correct
21 Correct 152 ms 63768 KB Output is correct
22 Correct 159 ms 63752 KB Output is correct
23 Correct 139 ms 63820 KB Output is correct
24 Correct 141 ms 63816 KB Output is correct
25 Correct 117 ms 38000 KB Output is correct
26 Correct 153 ms 63908 KB Output is correct
27 Correct 150 ms 63816 KB Output is correct
28 Correct 144 ms 63820 KB Output is correct

Subtask #5
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 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 0 ms 348 KB Output is correct
8 Correct 0 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 0 ms 348 KB Output is correct
12 Correct 3 ms 1628 KB Output is correct
13 Correct 3 ms 1628 KB Output is correct
14 Correct 3 ms 1628 KB Output is correct
15 Correct 21 ms 4212 KB Output is correct
16 Correct 143 ms 63816 KB Output is correct
17 Correct 165 ms 63816 KB Output is correct
18 Correct 129 ms 63764 KB Output is correct
19 Correct 148 ms 63816 KB Output is correct
20 Correct 133 ms 63820 KB Output is correct

Subtask #6
26.0 / 26.0

# 결과 실행 시간 메모리 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 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 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 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 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 1 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 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 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 0 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 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 3 ms 1628 KB Output is correct
40 Correct 3 ms 1628 KB Output is correct
41 Correct 3 ms 1628 KB Output is correct
42 Correct 3 ms 1628 KB Output is correct
43 Correct 3 ms 1116 KB Output is correct
44 Correct 3 ms 1624 KB Output is correct
45 Correct 3 ms 1628 KB Output is correct
46 Correct 3 ms 1524 KB Output is correct
47 Correct 3 ms 1624 KB Output is correct
48 Correct 3 ms 1628 KB Output is correct
49 Correct 3 ms 1624 KB Output is correct
50 Correct 3 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 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 1 ms 344 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 3 ms 1628 KB Output is correct
66 Correct 3 ms 1628 KB Output is correct
67 Correct 3 ms 1116 KB Output is correct
68 Correct 4 ms 1628 KB Output is correct
69 Correct 3 ms 1628 KB Output is correct
70 Correct 23 ms 4212 KB Output is correct
71 Correct 152 ms 63768 KB Output is correct
72 Correct 159 ms 63752 KB Output is correct
73 Correct 139 ms 63820 KB Output is correct
74 Correct 141 ms 63816 KB Output is correct
75 Correct 117 ms 38000 KB Output is correct
76 Correct 153 ms 63908 KB Output is correct
77 Correct 150 ms 63816 KB Output is correct
78 Correct 144 ms 63820 KB Output is correct
79 Correct 0 ms 344 KB Output is correct
80 Correct 0 ms 344 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 1 ms 348 KB Output is correct
88 Correct 0 ms 348 KB Output is correct
89 Correct 0 ms 348 KB Output is correct
90 Correct 3 ms 1628 KB Output is correct
91 Correct 3 ms 1628 KB Output is correct
92 Correct 3 ms 1628 KB Output is correct
93 Correct 21 ms 4212 KB Output is correct
94 Correct 143 ms 63816 KB Output is correct
95 Correct 165 ms 63816 KB Output is correct
96 Correct 129 ms 63764 KB Output is correct
97 Correct 148 ms 63816 KB Output is correct
98 Correct 133 ms 63820 KB Output is correct
99 Correct 147 ms 63816 KB Output is correct
100 Correct 150 ms 63760 KB Output is correct
101 Correct 140 ms 64076 KB Output is correct
102 Correct 151 ms 63820 KB Output is correct
103 Correct 151 ms 63820 KB Output is correct
104 Correct 144 ms 63724 KB Output is correct
105 Correct 155 ms 63816 KB Output is correct