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Submission #1010323

# Submission time Handle Problem Language Result Execution time Memory
1010323 2024-06-28T17:56:03 Z ttamx Fire (BOI24_fire) C++17
100 / 100
 360 ms 35528 KB 
#include<bits/stdc++.h>

using namespace std;

const int N=2e5+5;
const int LG=18;
const int INF=INT_MAX/2;

int n,m;
int l[N],r[N],vals[2*N];
int ans=INF;

struct Fenwick{
    int t[2*N];
    void update(int i,int v){
        for(;i<2*N;i+=i&-i)t[i]=max(t[i],v);
    }
    int query(int i){
        int res=0;
        for(;i>0;i-=i&-i)res=max(res,t[i]);
        return res;
    }
}f[LG];

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m;
    for(int i=1;i<=n;i++){
        cin >> l[i] >> r[i];
        vals[i*2-1]=l[i],vals[i*2]=r[i];
    }
    sort(vals+1,vals+2*n+1);
    for(int i=1;i<=n;i++){
        l[i]=lower_bound(vals+1,vals+2*n+1,l[i])-vals;
        r[i]=lower_bound(vals+1,vals+2*n+1,r[i])-vals;
    }
    for(int i=1;i<=n;i++)if(l[i]<r[i])f[0].update(l[i],r[i]);
    for(int k=1;k<LG;k++){
        for(int i=1;i<=2*n;i++){
            f[k].update(i,f[k-1].query(f[k-1].query(i)));
        }
    }
    for(int i=1;i<=n;i++)if(r[i]<l[i]){
        int p=r[i],res=1;
        for(int j=LG-1;j>=0;j--){
            int x=f[j].query(p);
            if(x>=l[i])continue;
            p=x;
            res+=1<<j;
        }
        if(f[0].query(p)<l[i])continue;
        ans=min(ans,res+1);
    }
    cout << (ans==INF?-1:ans) << "\n";
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5208 KB Output is correct
2 Correct 1 ms 5208 KB Output is correct
3 Correct 1 ms 5208 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 1 ms 5208 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 1 ms 5212 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 1 ms 5212 KB Output is correct
19 Correct 1 ms 5208 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 1 ms 5208 KB Output is correct
23 Correct 1 ms 5212 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5208 KB Output is correct
2 Correct 1 ms 5208 KB Output is correct
3 Correct 1 ms 5208 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 1 ms 5208 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 1 ms 5212 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 1 ms 5212 KB Output is correct
19 Correct 1 ms 5208 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 1 ms 5208 KB Output is correct
23 Correct 1 ms 5212 KB Output is correct
24 Correct 1 ms 5212 KB Output is correct
25 Correct 1 ms 5212 KB Output is correct
26 Correct 2 ms 5212 KB Output is correct
27 Correct 1 ms 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 1 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 1 ms 5212 KB Output is correct
33 Correct 1 ms 5212 KB Output is correct
34 Correct 1 ms 5212 KB Output is correct
35 Correct 1 ms 5212 KB Output is correct
36 Correct 1 ms 5212 KB Output is correct
37 Correct 1 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5208 KB Output is correct
2 Correct 1 ms 5208 KB Output is correct
3 Correct 1 ms 5208 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 1 ms 5208 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 1 ms 5212 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 1 ms 5212 KB Output is correct
19 Correct 1 ms 5208 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 1 ms 5208 KB Output is correct
23 Correct 1 ms 5212 KB Output is correct
24 Correct 1 ms 5212 KB Output is correct
25 Correct 1 ms 5212 KB Output is correct
26 Correct 2 ms 5212 KB Output is correct
27 Correct 1 ms 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 1 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 1 ms 5212 KB Output is correct
33 Correct 1 ms 5212 KB Output is correct
34 Correct 1 ms 5212 KB Output is correct
35 Correct 1 ms 5212 KB Output is correct
36 Correct 1 ms 5212 KB Output is correct
37 Correct 1 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 8 ms 5720 KB Output is correct
40 Correct 7 ms 5724 KB Output is correct
41 Correct 8 ms 5768 KB Output is correct
42 Correct 8 ms 5864 KB Output is correct
43 Correct 8 ms 5720 KB Output is correct
44 Correct 8 ms 5724 KB Output is correct
45 Correct 8 ms 5692 KB Output is correct
46 Correct 7 ms 5724 KB Output is correct
47 Correct 8 ms 5724 KB Output is correct
48 Correct 8 ms 5720 KB Output is correct
49 Correct 9 ms 5724 KB Output is correct
50 Correct 8 ms 5844 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5212 KB Output is correct
2 Correct 1 ms 5212 KB Output is correct
3 Correct 1 ms 5324 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 1 ms 5320 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 2 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 7 ms 5724 KB Output is correct
16 Correct 7 ms 5724 KB Output is correct
17 Correct 7 ms 5748 KB Output is correct
18 Correct 9 ms 5820 KB Output is correct
19 Correct 10 ms 5724 KB Output is correct
20 Correct 216 ms 30768 KB Output is correct
21 Correct 290 ms 35504 KB Output is correct
22 Correct 288 ms 35388 KB Output is correct
23 Correct 283 ms 34640 KB Output is correct
24 Correct 360 ms 35372 KB Output is correct
25 Correct 292 ms 34640 KB Output is correct
26 Correct 337 ms 35408 KB Output is correct
27 Correct 292 ms 35412 KB Output is correct
28 Correct 280 ms 35380 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5212 KB Output is correct
2 Correct 2 ms 5212 KB Output is correct
3 Correct 1 ms 5080 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 1 ms 5212 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 9 ms 5720 KB Output is correct
13 Correct 10 ms 5724 KB Output is correct
14 Correct 8 ms 5776 KB Output is correct
15 Correct 235 ms 31024 KB Output is correct
16 Correct 289 ms 34508 KB Output is correct
17 Correct 289 ms 35408 KB Output is correct
18 Correct 322 ms 35412 KB Output is correct
19 Correct 313 ms 35516 KB Output is correct
20 Correct 312 ms 34644 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5208 KB Output is correct
2 Correct 1 ms 5208 KB Output is correct
3 Correct 1 ms 5208 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 1 ms 5208 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 1 ms 5212 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 1 ms 5212 KB Output is correct
19 Correct 1 ms 5208 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 1 ms 5208 KB Output is correct
23 Correct 1 ms 5212 KB Output is correct
24 Correct 1 ms 5212 KB Output is correct
25 Correct 1 ms 5212 KB Output is correct
26 Correct 2 ms 5212 KB Output is correct
27 Correct 1 ms 5212 KB Output is correct
28 Correct 2 ms 5212 KB Output is correct
29 Correct 1 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 2 ms 5208 KB Output is correct
32 Correct 1 ms 5212 KB Output is correct
33 Correct 1 ms 5212 KB Output is correct
34 Correct 1 ms 5212 KB Output is correct
35 Correct 1 ms 5212 KB Output is correct
36 Correct 1 ms 5212 KB Output is correct
37 Correct 1 ms 5212 KB Output is correct
38 Correct 2 ms 5212 KB Output is correct
39 Correct 8 ms 5720 KB Output is correct
40 Correct 7 ms 5724 KB Output is correct
41 Correct 8 ms 5768 KB Output is correct
42 Correct 8 ms 5864 KB Output is correct
43 Correct 8 ms 5720 KB Output is correct
44 Correct 8 ms 5724 KB Output is correct
45 Correct 8 ms 5692 KB Output is correct
46 Correct 7 ms 5724 KB Output is correct
47 Correct 8 ms 5724 KB Output is correct
48 Correct 8 ms 5720 KB Output is correct
49 Correct 9 ms 5724 KB Output is correct
50 Correct 8 ms 5844 KB Output is correct
51 Correct 1 ms 5212 KB Output is correct
52 Correct 1 ms 5212 KB Output is correct
53 Correct 1 ms 5324 KB Output is correct
54 Correct 1 ms 5212 KB Output is correct
55 Correct 1 ms 5212 KB Output is correct
56 Correct 1 ms 5212 KB Output is correct
57 Correct 1 ms 5212 KB Output is correct
58 Correct 1 ms 5320 KB Output is correct
59 Correct 1 ms 5212 KB Output is correct
60 Correct 1 ms 5212 KB Output is correct
61 Correct 1 ms 5212 KB Output is correct
62 Correct 2 ms 5212 KB Output is correct
63 Correct 1 ms 5212 KB Output is correct
64 Correct 1 ms 5212 KB Output is correct
65 Correct 7 ms 5724 KB Output is correct
66 Correct 7 ms 5724 KB Output is correct
67 Correct 7 ms 5748 KB Output is correct
68 Correct 9 ms 5820 KB Output is correct
69 Correct 10 ms 5724 KB Output is correct
70 Correct 216 ms 30768 KB Output is correct
71 Correct 290 ms 35504 KB Output is correct
72 Correct 288 ms 35388 KB Output is correct
73 Correct 283 ms 34640 KB Output is correct
74 Correct 360 ms 35372 KB Output is correct
75 Correct 292 ms 34640 KB Output is correct
76 Correct 337 ms 35408 KB Output is correct
77 Correct 292 ms 35412 KB Output is correct
78 Correct 280 ms 35380 KB Output is correct
79 Correct 1 ms 5212 KB Output is correct
80 Correct 2 ms 5212 KB Output is correct
81 Correct 1 ms 5080 KB Output is correct
82 Correct 1 ms 5212 KB Output is correct
83 Correct 1 ms 5212 KB Output is correct
84 Correct 1 ms 5212 KB Output is correct
85 Correct 1 ms 5212 KB Output is correct
86 Correct 1 ms 5212 KB Output is correct
87 Correct 1 ms 5212 KB Output is correct
88 Correct 1 ms 5212 KB Output is correct
89 Correct 1 ms 5212 KB Output is correct
90 Correct 9 ms 5720 KB Output is correct
91 Correct 10 ms 5724 KB Output is correct
92 Correct 8 ms 5776 KB Output is correct
93 Correct 235 ms 31024 KB Output is correct
94 Correct 289 ms 34508 KB Output is correct
95 Correct 289 ms 35408 KB Output is correct
96 Correct 322 ms 35412 KB Output is correct
97 Correct 313 ms 35516 KB Output is correct
98 Correct 312 ms 34644 KB Output is correct
99 Correct 308 ms 35408 KB Output is correct
100 Correct 298 ms 35528 KB Output is correct
101 Correct 334 ms 35408 KB Output is correct
102 Correct 314 ms 35412 KB Output is correct
103 Correct 305 ms 35376 KB Output is correct
104 Correct 333 ms 35412 KB Output is correct
105 Correct 263 ms 34132 KB Output is correct