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Submission #1039597

# Submission time Handle Problem Language Result Execution time Memory
1039597 2024-07-31T05:12:37 Z 정희우(#10993) Sprinklers (CEOI24_sprinklers) C++17
100 / 100
 255 ms 4624 KB 
#include<iostream>
#include<algorithm>
#include<vector>

using namespace std;
using lint = long long;
using intp = pair<int,int>;
using vint = vector<int>;

const int MAX_N=100010;
const int MAX_D=1000000010;

int n,m;
int sarr[MAX_N],farr[MAX_N];
int ll[MAX_N],lr[MAX_N],rl[MAX_N],rr[MAX_N];
int dt[MAX_N];
char ans[MAX_N];

bool solve(int d)
{
    for(int i=0;i<n;i++)
    {
        ll[i]=lower_bound(farr,farr+m,sarr[i]-d)-farr;
        rr[i]=upper_bound(farr,farr+m,sarr[i]+d)-farr;
    }
    fill(dt,dt+n+1,0);
    for(int i=0;i<n;i++)
    {
        if(dt[i]>=rl[i])dt[i+1]=max(dt[i+1],rr[i]);
        if(i<=n-2 && dt[i]>=ll[i+1])dt[i+2]=max(dt[i+2],rr[i]);
        if(dt[i]>=ll[i])dt[i+1]=max(dt[i+1],lr[i]);
        else return false;
    }
    return dt[n]==m;
}

int main()
{
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    cin >> n >> m;
    for(int i=0;i<n;i++)
        cin >> sarr[i];
    for(int i=0;i<m;i++)
        cin >> farr[i];
    m=unique(farr,farr+m)-farr;
    for(int i=0;i<n;i++)
    {
        lr[i]=upper_bound(farr,farr+m,sarr[i])-farr;
        rl[i]=lower_bound(farr,farr+m,sarr[i])-farr;
    }
    int lb=0,ub=MAX_D;
    while(lb<ub)
    {
        int d=(lb+ub)/2;
        if(solve(d))ub=d;
        else lb=d+1;
    }
    if(lb==MAX_D)
    {
        cout << -1;
        return 0;
    }
    solve(lb);
    for(int i=n;i>0;)
    {
        if(dt[i]==rr[i-1] && dt[i-1]>=rl[i-1])
            ans[--i]='R';
        else if(i>=2 && dt[i]==rr[i-2] && dt[i-2]>=ll[i-1])
        {
            ans[--i]='L';
            ans[--i]='R';
        }
        else
            ans[--i]='L';
    }
    cout << lb << '\n' << ans;
    return 0;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Correct
2 Correct 0 ms 2396 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Correct
2 Correct 7 ms 604 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 6 ms 860 KB Correct
5 Correct 7 ms 2652 KB Correct
6 Correct 1 ms 2396 KB Correct
7 Correct 0 ms 2396 KB Correct
8 Correct 3 ms 2396 KB Correct
9 Correct 0 ms 2396 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Correct
2 Correct 9 ms 2660 KB Correct
3 Correct 16 ms 2396 KB Correct
4 Correct 182 ms 3180 KB Correct
5 Correct 179 ms 3156 KB Correct
6 Correct 1 ms 2392 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 100 ms 3176 KB Correct
9 Correct 105 ms 3184 KB Correct
10 Correct 119 ms 3164 KB Correct
11 Correct 59 ms 2900 KB Correct
12 Correct 91 ms 1624 KB Correct
13 Correct 137 ms 3032 KB Correct
14 Correct 149 ms 3152 KB Correct
15 Correct 156 ms 3156 KB Correct
16 Correct 133 ms 3056 KB Correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Correct
2 Correct 0 ms 2396 KB Correct
3 Correct 1 ms 2392 KB Correct
4 Correct 1 ms 2396 KB Correct
5 Correct 0 ms 348 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 0 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 0 ms 2396 KB Correct
12 Correct 0 ms 2396 KB Correct
13 Correct 1 ms 348 KB Correct
14 Correct 0 ms 348 KB Correct
15 Correct 1 ms 344 KB Correct
16 Correct 1 ms 2396 KB Correct
17 Correct 0 ms 2396 KB Correct
18 Correct 0 ms 376 KB Correct
19 Correct 0 ms 348 KB Correct
20 Correct 1 ms 2396 KB Correct

Subtask #4
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Correct
2 Correct 38 ms 2652 KB Correct
3 Correct 214 ms 3168 KB Correct
4 Correct 255 ms 4436 KB Correct
5 Correct 227 ms 4496 KB Correct
6 Correct 219 ms 4428 KB Correct
7 Correct 220 ms 4624 KB Correct
8 Correct 220 ms 4476 KB Correct
9 Correct 218 ms 4436 KB Correct
10 Correct 217 ms 4460 KB Correct
11 Correct 205 ms 4416 KB Correct
12 Correct 1 ms 348 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 71 ms 3560 KB Correct
15 Correct 74 ms 3572 KB Correct
16 Correct 77 ms 3756 KB Correct
17 Correct 60 ms 3708 KB Correct
18 Correct 73 ms 3672 KB Correct
19 Correct 108 ms 3928 KB Correct
20 Correct 189 ms 4148 KB Correct
21 Correct 197 ms 4244 KB Correct
22 Correct 189 ms 4208 KB Correct
23 Correct 179 ms 4176 KB Correct
24 Correct 170 ms 3920 KB Correct
25 Correct 167 ms 3920 KB Correct
26 Correct 97 ms 3164 KB Correct
27 Correct 111 ms 2012 KB Correct
28 Correct 160 ms 3920 KB Correct
29 Correct 185 ms 3808 KB Correct
30 Correct 222 ms 3844 KB Correct
31 Correct 165 ms 3784 KB Correct

Subtask #5
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Correct
2 Correct 0 ms 2396 KB Correct
3 Correct 7 ms 604 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 6 ms 860 KB Correct
6 Correct 7 ms 2652 KB Correct
7 Correct 1 ms 2396 KB Correct
8 Correct 0 ms 2396 KB Correct
9 Correct 3 ms 2396 KB Correct
10 Correct 0 ms 2396 KB Correct
11 Correct 9 ms 2660 KB Correct
12 Correct 16 ms 2396 KB Correct
13 Correct 182 ms 3180 KB Correct
14 Correct 179 ms 3156 KB Correct
15 Correct 1 ms 2392 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 100 ms 3176 KB Correct
18 Correct 105 ms 3184 KB Correct
19 Correct 119 ms 3164 KB Correct
20 Correct 59 ms 2900 KB Correct
21 Correct 91 ms 1624 KB Correct
22 Correct 137 ms 3032 KB Correct
23 Correct 149 ms 3152 KB Correct
24 Correct 156 ms 3156 KB Correct
25 Correct 133 ms 3056 KB Correct
26 Correct 1 ms 2392 KB Correct
27 Correct 1 ms 2396 KB Correct
28 Correct 0 ms 348 KB Correct
29 Correct 0 ms 348 KB Correct
30 Correct 0 ms 348 KB Correct
31 Correct 0 ms 348 KB Correct
32 Correct 0 ms 348 KB Correct
33 Correct 0 ms 348 KB Correct
34 Correct 0 ms 2396 KB Correct
35 Correct 0 ms 2396 KB Correct
36 Correct 1 ms 348 KB Correct
37 Correct 0 ms 348 KB Correct
38 Correct 1 ms 344 KB Correct
39 Correct 1 ms 2396 KB Correct
40 Correct 0 ms 2396 KB Correct
41 Correct 0 ms 376 KB Correct
42 Correct 0 ms 348 KB Correct
43 Correct 1 ms 2396 KB Correct
44 Correct 38 ms 2652 KB Correct
45 Correct 214 ms 3168 KB Correct
46 Correct 255 ms 4436 KB Correct
47 Correct 227 ms 4496 KB Correct
48 Correct 219 ms 4428 KB Correct
49 Correct 220 ms 4624 KB Correct
50 Correct 220 ms 4476 KB Correct
51 Correct 218 ms 4436 KB Correct
52 Correct 217 ms 4460 KB Correct
53 Correct 205 ms 4416 KB Correct
54 Correct 1 ms 348 KB Correct
55 Correct 0 ms 348 KB Correct
56 Correct 71 ms 3560 KB Correct
57 Correct 74 ms 3572 KB Correct
58 Correct 77 ms 3756 KB Correct
59 Correct 60 ms 3708 KB Correct
60 Correct 73 ms 3672 KB Correct
61 Correct 108 ms 3928 KB Correct
62 Correct 189 ms 4148 KB Correct
63 Correct 197 ms 4244 KB Correct
64 Correct 189 ms 4208 KB Correct
65 Correct 179 ms 4176 KB Correct
66 Correct 170 ms 3920 KB Correct
67 Correct 167 ms 3920 KB Correct
68 Correct 97 ms 3164 KB Correct
69 Correct 111 ms 2012 KB Correct
70 Correct 160 ms 3920 KB Correct
71 Correct 185 ms 3808 KB Correct
72 Correct 222 ms 3844 KB Correct
73 Correct 165 ms 3784 KB Correct
74 Correct 18 ms 1696 KB Correct
75 Correct 226 ms 4444 KB Correct
76 Correct 228 ms 4460 KB Correct
77 Correct 1 ms 2392 KB Correct
78 Correct 144 ms 4532 KB Correct
79 Correct 119 ms 4460 KB Correct
80 Correct 110 ms 4456 KB Correct
81 Correct 59 ms 3736 KB Correct
82 Correct 87 ms 3668 KB Correct
83 Correct 81 ms 3752 KB Correct
84 Correct 22 ms 1332 KB Correct
85 Correct 188 ms 3924 KB Correct
86 Correct 197 ms 4080 KB Correct
87 Correct 173 ms 4016 KB Correct
88 Correct 7 ms 3416 KB Correct
89 Correct 7 ms 1628 KB Correct