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Submission #1062067

# Submission time Handle Problem Language Result Execution time Memory
1062067 2024-08-16T18:16:59 Z Jarif_Rahman Fire (BOI24_fire) C++17
100 / 100
 209 ms 50496 KB 
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m; cin >> n >> m;
    vector<pair<int, int>> A(n);
    int MX = -1;
    for(auto &[x, y]: A){
        cin >> x >> y;
        if(x > y){
            MX = max(MX, y);
            y+=m;
        }
    }
    sort(A.begin(), A.end());

    map<int, vector<int>> L, R;
    for(int i = 0; i < n; i++){
        L[A[i].first].push_back(i);
        if(A[i].second < m) R[A[i].second].push_back(i);
    }

    vector<int> nxt(n, -1);
    set<pair<int, int>> st;
    while(!L.empty() || !R.empty()){
        if(R.empty() || (!L.empty() && L.begin()->first <= R.begin()->first)){
            auto [t, a] = *L.begin();
            L.erase(L.begin());
            for(int i: a) st.insert({A[i].second, i});
        }
        else{
            auto [t, a] = *R.begin();
            R.erase(R.begin());
            for(int i: a){
                st.erase({A[i].second, i});
                if(!st.empty() && st.rbegin()->first > A[i].second && A[st.rbegin()->second].first > A[i].first) nxt[i] = st.rbegin()->second;
            }
        }
    }

    vector<int> cnt(n, 0), mx(n, 0);
    int ans = 1e9;
    for(int i = n-1; i >= 0; i--){
        if(nxt[i] == -1){
            if(A[i].second >= m) cnt[i] = 1, mx[i] = A[i].second-m;
        }
        else if(cnt[nxt[i]] != 0){
            cnt[i] = cnt[nxt[i]]+1;
            mx[i] = mx[nxt[i]];
            if(mx[i] >= A[i].first) ans = min(ans, cnt[i]);
            else if(MX >= A[i].first) ans = min(ans, cnt[i]+1);
        }
    }

    if(ans > n) ans = -1;
    cout << ans << "\n";
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 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 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 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 1 ms 600 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 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 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 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 1 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 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 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 1 ms 600 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 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 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 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 452 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 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 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 456 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 456 KB Output is correct
38 Correct 1 ms 600 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 1 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 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 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 1 ms 600 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 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 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 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 452 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 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 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 456 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 456 KB Output is correct
38 Correct 1 ms 600 KB Output is correct
39 Correct 4 ms 1624 KB Output is correct
40 Correct 4 ms 1492 KB Output is correct
41 Correct 4 ms 1488 KB Output is correct
42 Correct 4 ms 1480 KB Output is correct
43 Correct 4 ms 1372 KB Output is correct
44 Correct 4 ms 1580 KB Output is correct
45 Correct 3 ms 1628 KB Output is correct
46 Correct 3 ms 1628 KB Output is correct
47 Correct 4 ms 1628 KB Output is correct
48 Correct 3 ms 1628 KB Output is correct
49 Correct 3 ms 1628 KB Output is correct
50 Correct 3 ms 1628 KB Output is correct

Subtask #4
13.0 / 13.0

# 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 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 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 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 3 ms 1372 KB Output is correct
16 Correct 3 ms 1372 KB Output is correct
17 Correct 3 ms 1372 KB Output is correct
18 Correct 3 ms 1372 KB Output is correct
19 Correct 4 ms 1372 KB Output is correct
20 Correct 56 ms 12984 KB Output is correct
21 Correct 191 ms 50260 KB Output is correct
22 Correct 181 ms 50256 KB Output is correct
23 Correct 140 ms 49488 KB Output is correct
24 Correct 142 ms 50260 KB Output is correct
25 Correct 209 ms 43056 KB Output is correct
26 Correct 150 ms 50496 KB Output is correct
27 Correct 146 ms 50420 KB Output is correct
28 Correct 152 ms 50264 KB Output is correct

Subtask #5
21.0 / 21.0

# 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 1 ms 348 KB Output is correct
5 Correct 1 ms 344 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 4 ms 1372 KB Output is correct
13 Correct 3 ms 1372 KB Output is correct
14 Correct 3 ms 1372 KB Output is correct
15 Correct 57 ms 12720 KB Output is correct
16 Correct 161 ms 49376 KB Output is correct
17 Correct 171 ms 50252 KB Output is correct
18 Correct 168 ms 49144 KB Output is correct
19 Correct 159 ms 50256 KB Output is correct
20 Correct 148 ms 49480 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 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 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 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 1 ms 600 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 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 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 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 452 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 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 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 456 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 456 KB Output is correct
38 Correct 1 ms 600 KB Output is correct
39 Correct 4 ms 1624 KB Output is correct
40 Correct 4 ms 1492 KB Output is correct
41 Correct 4 ms 1488 KB Output is correct
42 Correct 4 ms 1480 KB Output is correct
43 Correct 4 ms 1372 KB Output is correct
44 Correct 4 ms 1580 KB Output is correct
45 Correct 3 ms 1628 KB Output is correct
46 Correct 3 ms 1628 KB Output is correct
47 Correct 4 ms 1628 KB Output is correct
48 Correct 3 ms 1628 KB Output is correct
49 Correct 3 ms 1628 KB Output is correct
50 Correct 3 ms 1628 KB Output is correct
51 Correct 0 ms 344 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 344 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 344 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 1 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 3 ms 1372 KB Output is correct
66 Correct 3 ms 1372 KB Output is correct
67 Correct 3 ms 1372 KB Output is correct
68 Correct 3 ms 1372 KB Output is correct
69 Correct 4 ms 1372 KB Output is correct
70 Correct 56 ms 12984 KB Output is correct
71 Correct 191 ms 50260 KB Output is correct
72 Correct 181 ms 50256 KB Output is correct
73 Correct 140 ms 49488 KB Output is correct
74 Correct 142 ms 50260 KB Output is correct
75 Correct 209 ms 43056 KB Output is correct
76 Correct 150 ms 50496 KB Output is correct
77 Correct 146 ms 50420 KB Output is correct
78 Correct 152 ms 50264 KB Output is correct
79 Correct 0 ms 344 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 1 ms 348 KB Output is correct
83 Correct 1 ms 344 KB Output is correct
84 Correct 1 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 0 ms 348 KB Output is correct
88 Correct 1 ms 348 KB Output is correct
89 Correct 0 ms 348 KB Output is correct
90 Correct 4 ms 1372 KB Output is correct
91 Correct 3 ms 1372 KB Output is correct
92 Correct 3 ms 1372 KB Output is correct
93 Correct 57 ms 12720 KB Output is correct
94 Correct 161 ms 49376 KB Output is correct
95 Correct 171 ms 50252 KB Output is correct
96 Correct 168 ms 49144 KB Output is correct
97 Correct 159 ms 50256 KB Output is correct
98 Correct 148 ms 49480 KB Output is correct
99 Correct 194 ms 50272 KB Output is correct
100 Correct 173 ms 50268 KB Output is correct
101 Correct 153 ms 50260 KB Output is correct
102 Correct 157 ms 50256 KB Output is correct
103 Correct 148 ms 50492 KB Output is correct
104 Correct 143 ms 50416 KB Output is correct
105 Correct 137 ms 49236 KB Output is correct