oj.uz

답안 #1083772

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1083772 2024-09-04T06:08:07 Z vjudge1 Fire (BOI24_fire) C++17
100 / 100
 150 ms 74840 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define pb push_back
#define for1(i,x,n) for(int i=x;i<=n;i++)
#define for2(i,x,n) for(int i=x;i>=n;i--)
#define int ll

typedef long long ll;
typedef pair<int,int> pii;

const ll maxn=2e5+69;
const ll mod=1e9+7;
const ll inf=1e18;
int n,m;
pii a[maxn];
int pre[maxn][21],val[maxn][21];
int suf[maxn];
pii jump(int u)
{
    int r=a[u].fi,res=0;
    for2(i,20,0)
    {
        if (r-a[pre[u][i]].se < m)
        {
//            cerr<<i<<' '<< u<<" -> "<<pre[u][i] <<' '<<val[u][i]<<'\n';
            res+=val[u][i];
            u=pre[u][i];
        }
    }
//    cerr<< "dmm "<< res<<'\n';
    return {pre[u][0],res+(pre[u][0]!=u)};
}
void sol()
{
    cin >> n>> m;
    for1(i,1,n)
    {
        cin >>a[i].se>> a[i].fi;
        if (a[i].fi<a[i].se) a[i].fi+=m;
//        cerr<<n<< "adsa\n";
    }
    sort(a+1,a+1+n);
    suf[n]=n;
    for2(i,n-1,1)
    {
        if (a[i].se<a[suf[i+1]].se) suf[i]=i;
        else suf[i]=suf[i+1];
    }
    for1(i,1,n)
    {
        pre[i][0]=suf[upper_bound(a+1,a+1+n,make_pair(a[i].se,-inf))-a];
        val[i][0]=(pre[i][0]!=i);
    }
    for1(j,1,20) for1(i,1,n)
    {
        pre[i][j]=pre[pre[i][j-1]][j-1];
        val[i][j]=val[i][j-1]+val[pre[i][j-1]][j-1];
    }
//    for1(i,1,n) cerr <<a[i].se<<' '<<a[i].fi <<' '<< pre[i][0]<<' '<<val[i][0]<<'\n';
    int res=inf;
    for1(i,1,n)
    {
        pii j=jump(i);
        if (a[i].fi-a[j.fi].se>=m)
        {
            res=min(res,j.se);
//            cerr<<"gg "<< i<<' '<<j.fi<<' '<<j.se<<'\n';
        }
    }
    if (res==inf) cout << "-1";
    else cout << res+1;

}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
//    freopen("fire.inp","r",stdin);
//    freopen("fire.out","w",stdout);
    int t=1;//cin >> t;
    while (t--)
    {
        sol();
    }
}
/*

11 551
489 51
109 307
215 252
138 509
25 95
151 191
91 202
474 50
137 383
324 529
204 467

4 551
489 51
138 509
25 95
91 202

4 9
7 2
5 8
1 4
3 6
*/

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 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 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 344 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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 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 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 344 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 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 344 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 344 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 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 0 ms 344 KB Output is correct
38 Correct 1 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 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 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 344 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 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 344 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 344 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 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 0 ms 344 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 3 ms 2140 KB Output is correct
40 Correct 3 ms 2124 KB Output is correct
41 Correct 3 ms 2140 KB Output is correct
42 Correct 3 ms 2140 KB Output is correct
43 Correct 3 ms 2140 KB Output is correct
44 Correct 4 ms 2140 KB Output is correct
45 Correct 3 ms 2140 KB Output is correct
46 Correct 3 ms 2140 KB Output is correct
47 Correct 4 ms 2140 KB Output is correct
48 Correct 3 ms 2140 KB Output is correct
49 Correct 3 ms 2136 KB Output is correct
50 Correct 3 ms 2136 KB Output is correct

Subtask #4
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 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 1 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 600 KB Output is correct
11 Correct 0 ms 600 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 3 ms 2140 KB Output is correct
16 Correct 3 ms 2136 KB Output is correct
17 Correct 3 ms 2136 KB Output is correct
18 Correct 3 ms 2140 KB Output is correct
19 Correct 3 ms 2272 KB Output is correct
20 Correct 95 ms 71504 KB Output is correct
21 Correct 127 ms 74576 KB Output is correct
22 Correct 131 ms 74512 KB Output is correct
23 Correct 128 ms 73812 KB Output is correct
24 Correct 131 ms 74580 KB Output is correct
25 Correct 140 ms 74068 KB Output is correct
26 Correct 128 ms 74580 KB Output is correct
27 Correct 140 ms 74520 KB Output is correct
28 Correct 133 ms 74648 KB Output is correct

Subtask #5
21.0 / 21.0

# 결과 실행 시간 메모리 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 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 3 ms 2348 KB Output is correct
13 Correct 3 ms 2136 KB Output is correct
14 Correct 3 ms 2140 KB Output is correct
15 Correct 109 ms 71508 KB Output is correct
16 Correct 138 ms 73808 KB Output is correct
17 Correct 134 ms 74620 KB Output is correct
18 Correct 122 ms 74612 KB Output is correct
19 Correct 134 ms 74840 KB Output is correct
20 Correct 130 ms 73680 KB Output is correct

Subtask #6
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 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 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 344 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 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 344 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 344 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 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 0 ms 344 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 3 ms 2140 KB Output is correct
40 Correct 3 ms 2124 KB Output is correct
41 Correct 3 ms 2140 KB Output is correct
42 Correct 3 ms 2140 KB Output is correct
43 Correct 3 ms 2140 KB Output is correct
44 Correct 4 ms 2140 KB Output is correct
45 Correct 3 ms 2140 KB Output is correct
46 Correct 3 ms 2140 KB Output is correct
47 Correct 4 ms 2140 KB Output is correct
48 Correct 3 ms 2140 KB Output is correct
49 Correct 3 ms 2136 KB Output is correct
50 Correct 3 ms 2136 KB Output is correct
51 Correct 0 ms 344 KB Output is correct
52 Correct 1 ms 344 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 1 ms 348 KB Output is correct
60 Correct 1 ms 600 KB Output is correct
61 Correct 0 ms 600 KB Output is correct
62 Correct 1 ms 460 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 1 ms 348 KB Output is correct
65 Correct 3 ms 2140 KB Output is correct
66 Correct 3 ms 2136 KB Output is correct
67 Correct 3 ms 2136 KB Output is correct
68 Correct 3 ms 2140 KB Output is correct
69 Correct 3 ms 2272 KB Output is correct
70 Correct 95 ms 71504 KB Output is correct
71 Correct 127 ms 74576 KB Output is correct
72 Correct 131 ms 74512 KB Output is correct
73 Correct 128 ms 73812 KB Output is correct
74 Correct 131 ms 74580 KB Output is correct
75 Correct 140 ms 74068 KB Output is correct
76 Correct 128 ms 74580 KB Output is correct
77 Correct 140 ms 74520 KB Output is correct
78 Correct 133 ms 74648 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 1 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 1 ms 344 KB Output is correct
86 Correct 1 ms 344 KB Output is correct
87 Correct 0 ms 348 KB Output is correct
88 Correct 1 ms 600 KB Output is correct
89 Correct 1 ms 348 KB Output is correct
90 Correct 3 ms 2348 KB Output is correct
91 Correct 3 ms 2136 KB Output is correct
92 Correct 3 ms 2140 KB Output is correct
93 Correct 109 ms 71508 KB Output is correct
94 Correct 138 ms 73808 KB Output is correct
95 Correct 134 ms 74620 KB Output is correct
96 Correct 122 ms 74612 KB Output is correct
97 Correct 134 ms 74840 KB Output is correct
98 Correct 130 ms 73680 KB Output is correct
99 Correct 126 ms 74516 KB Output is correct
100 Correct 150 ms 74772 KB Output is correct
101 Correct 133 ms 74588 KB Output is correct
102 Correct 125 ms 74616 KB Output is correct
103 Correct 137 ms 74748 KB Output is correct
104 Correct 133 ms 74832 KB Output is correct
105 Correct 112 ms 73300 KB Output is correct