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Submission #1095803

# Submission time Handle Problem Language Result Execution time Memory
1095803 2024-10-03T07:59:31 Z SalihSahin Fire (BOI24_fire) C++14
100 / 100
 1463 ms 181180 KB 
#include <bits/stdc++.h>
#define pb push_back
using namespace std;

const int N = 2e5 + 5;
const int K = 20;
const int mod = 1e9 + 7;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int n, m;
    cin>>n>>m;
    vector<pair<int, int> > a(n);
    set<int> st;
    for(int i = 0; i < n; i++){
        cin>>a[i].first>>a[i].second;
        st.insert(a[i].first);
        st.insert(a[i].second);
        st.insert(a[i].first + m);
        st.insert(a[i].second + m);
    }
    map<int, int> pos;
    int here = 0;
    vector<int> vals;
    vals.pb(0);
    for(auto itr: st){
        pos[itr] = ++here;
        vals.pb(itr);
    }

    vector<int> upd(here + 1);
    for(int i = 0; i < n; i++){
        int f = a[i].first, s = a[i].second;
        if(f > s){
            upd[pos[f]] = max(upd[pos[f]], s + m);
        }
        else{
            upd[pos[f]] = max(upd[pos[f]], s);
            upd[pos[f + m]] = max(upd[pos[f]], s + m);
        }
    }
    vector<vector<int> > lift(here + 1, vector<int>(K));
    int val = 0;

    for(auto itr: st){
        val = max(val, upd[pos[itr]]);
        lift[pos[itr]][0] = pos[val];
    }
    
    for(int i = 1; i < K; i++){
        for(int j = 1; j <= here; j++){
            lift[j][i] = lift[lift[j][i-1]][i-1];
        }
    }

    int ans = n + 23;
    for(int st = 0; st < n; st++){
        int f = a[st].first;
        int cnt = 0;
        bool ok = 1;
        int r = pos[f];
        
        for(int bt = K-1; bt >= 0; bt--){
            if(vals[lift[r][bt]] < m + f){
                cnt += (1 << bt);
                r = lift[r][bt];
            }
        }

        if(vals[lift[r][0]] >= m + f) ans = min(ans, cnt + 1);
    }

    if(ans == n + 23) cout<<-1<<endl;
    else cout<<ans<<endl;
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:61:14: warning: unused variable 'ok' [-Wunused-variable]
   61 |         bool ok = 1;
      |              ^~

Subtask #1
14.0 / 14.0

# 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 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 344 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 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 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 1 ms 344 KB Output is correct

Subtask #2
17.0 / 17.0

# 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 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 344 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 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 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 1 ms 344 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 412 KB Output is correct
31 Correct 1 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 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 720 KB Output is correct
38 Correct 1 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# 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 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 344 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 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 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 1 ms 344 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 412 KB Output is correct
31 Correct 1 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 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 720 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 15 ms 4896 KB Output is correct
40 Correct 16 ms 4700 KB Output is correct
41 Correct 17 ms 4832 KB Output is correct
42 Correct 9 ms 2500 KB Output is correct
43 Correct 8 ms 2140 KB Output is correct
44 Correct 9 ms 2700 KB Output is correct
45 Correct 9 ms 2652 KB Output is correct
46 Correct 10 ms 2904 KB Output is correct
47 Correct 15 ms 4700 KB Output is correct
48 Correct 14 ms 4744 KB Output is correct
49 Correct 12 ms 4696 KB Output is correct
50 Correct 9 ms 2652 KB Output is correct

Subtask #4
13.0 / 13.0

# 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 0 ms 344 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 1 ms 604 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 1 ms 604 KB Output is correct
15 Correct 15 ms 4700 KB Output is correct
16 Correct 9 ms 2712 KB Output is correct
17 Correct 8 ms 2140 KB Output is correct
18 Correct 9 ms 2652 KB Output is correct
19 Correct 14 ms 4700 KB Output is correct
20 Correct 25 ms 1880 KB Output is correct
21 Correct 1326 ms 177372 KB Output is correct
22 Correct 1309 ms 181172 KB Output is correct
23 Correct 891 ms 92612 KB Output is correct
24 Correct 1385 ms 181180 KB Output is correct
25 Correct 648 ms 75204 KB Output is correct
26 Correct 782 ms 93376 KB Output is correct
27 Correct 819 ms 93748 KB Output is correct
28 Correct 1168 ms 176800 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 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 1 ms 600 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 15 ms 4860 KB Output is correct
13 Correct 9 ms 2648 KB Output is correct
14 Correct 9 ms 2704 KB Output is correct
15 Correct 25 ms 1884 KB Output is correct
16 Correct 852 ms 89536 KB Output is correct
17 Correct 1356 ms 180988 KB Output is correct
18 Correct 1403 ms 181176 KB Output is correct
19 Correct 1337 ms 181180 KB Output is correct
20 Correct 1036 ms 92608 KB Output is correct

Subtask #6
26.0 / 26.0

# 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 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 344 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 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 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 1 ms 344 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 412 KB Output is correct
31 Correct 1 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 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 720 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 15 ms 4896 KB Output is correct
40 Correct 16 ms 4700 KB Output is correct
41 Correct 17 ms 4832 KB Output is correct
42 Correct 9 ms 2500 KB Output is correct
43 Correct 8 ms 2140 KB Output is correct
44 Correct 9 ms 2700 KB Output is correct
45 Correct 9 ms 2652 KB Output is correct
46 Correct 10 ms 2904 KB Output is correct
47 Correct 15 ms 4700 KB Output is correct
48 Correct 14 ms 4744 KB Output is correct
49 Correct 12 ms 4696 KB Output is correct
50 Correct 9 ms 2652 KB Output is correct
51 Correct 1 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 344 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 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 1 ms 604 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 1 ms 604 KB Output is correct
65 Correct 15 ms 4700 KB Output is correct
66 Correct 9 ms 2712 KB Output is correct
67 Correct 8 ms 2140 KB Output is correct
68 Correct 9 ms 2652 KB Output is correct
69 Correct 14 ms 4700 KB Output is correct
70 Correct 25 ms 1880 KB Output is correct
71 Correct 1326 ms 177372 KB Output is correct
72 Correct 1309 ms 181172 KB Output is correct
73 Correct 891 ms 92612 KB Output is correct
74 Correct 1385 ms 181180 KB Output is correct
75 Correct 648 ms 75204 KB Output is correct
76 Correct 782 ms 93376 KB Output is correct
77 Correct 819 ms 93748 KB Output is correct
78 Correct 1168 ms 176800 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 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 1 ms 600 KB Output is correct
87 Correct 1 ms 348 KB Output is correct
88 Correct 1 ms 604 KB Output is correct
89 Correct 1 ms 344 KB Output is correct
90 Correct 15 ms 4860 KB Output is correct
91 Correct 9 ms 2648 KB Output is correct
92 Correct 9 ms 2704 KB Output is correct
93 Correct 25 ms 1884 KB Output is correct
94 Correct 852 ms 89536 KB Output is correct
95 Correct 1356 ms 180988 KB Output is correct
96 Correct 1403 ms 181176 KB Output is correct
97 Correct 1337 ms 181180 KB Output is correct
98 Correct 1036 ms 92608 KB Output is correct
99 Correct 1360 ms 181104 KB Output is correct
100 Correct 1314 ms 180996 KB Output is correct
101 Correct 1463 ms 181144 KB Output is correct
102 Correct 1342 ms 181172 KB Output is correct
103 Correct 912 ms 93708 KB Output is correct
104 Correct 1257 ms 172448 KB Output is correct
105 Correct 814 ms 179896 KB Output is correct