oj.uz

Submission #1094540

# Submission time Handle Problem Language Result Execution time Memory
1094540 2024-09-29T20:18:06 Z epicci23 Sprinklers (CEOI24_sprinklers) C++17
53 / 100
 93 ms 4128 KB 
#include "bits/stdc++.h"
#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;


int n,m;
vector<int> a,b;

void _(){
  cin >> n >> m;
  for(int i=0;i<n;i++){
  	int x; cin >> x;
  	a.push_back(x);
  }
  for(int i=0;i<m;i++){
  	int x;cin >> x;
  	b.push_back(x);
  }

  auto check = [&](int pow)->pair<bool,vector<char>>{

    int p=0;
    vector<char> res(n,'L');

    for(int i=0;i<m;){

      if(p==n) return {0,res};
      int lol=-1;
      while(p<n && a[p]<=b[i]){
        res[p]='R';
        lol=max(lol,a[p]+pow);
        p++;
      }

      if(lol>=b[i]){
       while(i<m && lol>=b[i]) i++;
       continue;
      }

      if(i==m) return {1,res};
      if(p==n) return {0,res};
      
      vector<int> f; 
      while(p<n && a[p]-pow<=b[i]) f.push_back(p++);

      if(sz(f)==0) return {0,res};

      if(sz(f)==1){
        while(i<m && b[i]<=a[f[0]]) i++;
        continue;
      }

      if(sz(f)>=3){
        for(int j=0;j<sz(f);j++){
          if(j==sz(f)-2) continue;
          res[f[j]]='R';
        }
        while(i<m && b[i]<=a[f.back()]+pow) i++;
        continue;
      }

      while(i<m && b[i]<=a[f[0]]) i++;
      if(i==m) return {1,res};
      if(b[i]>=a[f[1]]){
        res[f[1]]='R';
        while(i<m && b[i]<=a[f[1]]+pow) i++;
      }
      else{
        res[f[0]]='R';
        while(i<m && b[i]<=a[f[0]]+pow) i++;
      }
    }
    return {1,res};
  };

  auto check2 = [&](int pow)->pair<bool,vector<char>>{
    int p=n-1;
    vector<char> res(n,'R');

    for(int i=m-1;i>=0;){

      if(p<0) return {0,res};
      int lol=(int)1e18;
      while(p>=0 && a[p]>=b[i]){
        res[p]='L';
        lol=min(lol,a[p]-pow);
        p--;
      }

      if(lol<=b[i]){
       while(i>=0 && lol<=b[i]) i--;
       continue;
      }

      if(i<0) return {1,res};
      if(p<0) return {0,res};
      
      vector<int> f; 
      while(p>=0 && a[p]+pow>=b[i]) f.push_back(p--);

      if(sz(f)==0) return {0,res};

      if(sz(f)==1){
        while(i>=0 && b[i]>=a[f[0]]) i--;
        continue;
      }

      if(sz(f)>=3){
        for(int j=0;j<sz(f);j++){
          if(j==1) continue;
          res[f[j]]='L';
        }
        while(i>=0 && b[i]>=a[f.back()]-pow) i--;
        continue;
      }

      while(i>=0 && b[i]>=a[f[0]]) i--;
      if(i<0) return {1,res};

      if(b[i]<=a[f[1]]){
        res[f[1]]='L';
        while(i>=0 && b[i]>=a[f[1]]-pow) i--;
      }
      else{
        res[f[0]]='L';
        while(i>=0 && b[i]>=a[f[0]]-pow) i--;
      }
    }
    return {1,res};
  };


  int l=0,r=(int)1e18;
  while(l<r){
    int m=(l+r)/2;
    if(check(m).first || check2(m).first) r=m;
    else l=m+1;
  }  
  if(r==(int)1e18) cout << -1 << '\n';
  else if(check2(m).first){
    auto X = check2(l);
    cout << l << '\n';
    for(char x:X.second) cout << x;
    cout << '\n';
  }
  else{
    auto X = check(l);
    cout << l << '\n';
    for(char x:X.second) cout << x;
    cout << '\n';
  }
}

int32_t main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tc=1;//cin >> tc;
  while(tc--) _();
  return 0;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 8 ms 1500 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 9 ms 1500 KB Correct
5 Correct 9 ms 1496 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 2 ms 736 KB Correct
9 Correct 0 ms 348 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 16 ms 1504 KB Correct
3 Correct 5 ms 844 KB Correct
4 Correct 64 ms 3984 KB Correct
5 Correct 61 ms 3992 KB Correct
6 Correct 0 ms 344 KB Correct
7 Correct 0 ms 344 KB Correct
8 Correct 81 ms 4124 KB Correct
9 Correct 93 ms 4076 KB Correct
10 Correct 91 ms 4048 KB Correct
11 Correct 13 ms 1556 KB Correct
12 Correct 31 ms 2376 KB Correct
13 Correct 74 ms 3760 KB Correct
14 Correct 65 ms 3760 KB Correct
15 Correct 27 ms 2772 KB Correct
16 Correct 66 ms 3772 KB Correct

Subtask #3
17.0 / 17.0

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

Subtask #4
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 16 ms 1488 KB Correct
3 Correct 45 ms 2776 KB Correct
4 Correct 44 ms 2772 KB Correct
5 Correct 44 ms 2776 KB Correct
6 Correct 45 ms 2776 KB Correct
7 Correct 75 ms 4020 KB Correct
8 Correct 45 ms 2772 KB Correct
9 Correct 47 ms 2772 KB Correct
10 Correct 78 ms 4004 KB Correct
11 Correct 43 ms 2776 KB Correct
12 Correct 0 ms 344 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 14 ms 1552 KB Correct
15 Correct 19 ms 1500 KB Correct
16 Correct 13 ms 1500 KB Correct
17 Correct 14 ms 3676 KB Correct
18 Correct 15 ms 3676 KB Correct
19 Correct 18 ms 3672 KB Correct
20 Correct 32 ms 2672 KB Correct
21 Correct 31 ms 2776 KB Correct
22 Correct 25 ms 2772 KB Correct
23 Correct 24 ms 2772 KB Correct
24 Correct 65 ms 4012 KB Correct
25 Correct 19 ms 3412 KB Correct
26 Correct 14 ms 1496 KB Correct
27 Correct 18 ms 1244 KB Correct
28 Correct 19 ms 2772 KB Correct
29 Correct 18 ms 2772 KB Correct
30 Correct 18 ms 2776 KB Correct
31 Correct 65 ms 3672 KB Correct

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 8 ms 1500 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 9 ms 1500 KB Correct
6 Correct 9 ms 1496 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 2 ms 736 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 16 ms 1504 KB Correct
12 Correct 5 ms 844 KB Correct
13 Correct 64 ms 3984 KB Correct
14 Correct 61 ms 3992 KB Correct
15 Correct 0 ms 344 KB Correct
16 Correct 0 ms 344 KB Correct
17 Correct 81 ms 4124 KB Correct
18 Correct 93 ms 4076 KB Correct
19 Correct 91 ms 4048 KB Correct
20 Correct 13 ms 1556 KB Correct
21 Correct 31 ms 2376 KB Correct
22 Correct 74 ms 3760 KB Correct
23 Correct 65 ms 3760 KB Correct
24 Correct 27 ms 2772 KB Correct
25 Correct 66 ms 3772 KB Correct
26 Correct 0 ms 344 KB Correct
27 Correct 0 ms 344 KB Correct
28 Correct 0 ms 348 KB Correct
29 Correct 1 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 1 ms 344 KB Correct
34 Correct 0 ms 348 KB Correct
35 Correct 0 ms 348 KB Correct
36 Correct 0 ms 348 KB Correct
37 Correct 0 ms 348 KB Correct
38 Correct 0 ms 348 KB Correct
39 Correct 0 ms 348 KB Correct
40 Correct 0 ms 348 KB Correct
41 Correct 0 ms 348 KB Correct
42 Correct 1 ms 344 KB Correct
43 Correct 0 ms 348 KB Correct
44 Correct 16 ms 1488 KB Correct
45 Correct 45 ms 2776 KB Correct
46 Correct 44 ms 2772 KB Correct
47 Correct 44 ms 2776 KB Correct
48 Correct 45 ms 2776 KB Correct
49 Correct 75 ms 4020 KB Correct
50 Correct 45 ms 2772 KB Correct
51 Correct 47 ms 2772 KB Correct
52 Correct 78 ms 4004 KB Correct
53 Correct 43 ms 2776 KB Correct
54 Correct 0 ms 344 KB Correct
55 Correct 0 ms 348 KB Correct
56 Correct 14 ms 1552 KB Correct
57 Correct 19 ms 1500 KB Correct
58 Correct 13 ms 1500 KB Correct
59 Correct 14 ms 3676 KB Correct
60 Correct 15 ms 3676 KB Correct
61 Correct 18 ms 3672 KB Correct
62 Correct 32 ms 2672 KB Correct
63 Correct 31 ms 2776 KB Correct
64 Correct 25 ms 2772 KB Correct
65 Correct 24 ms 2772 KB Correct
66 Correct 65 ms 4012 KB Correct
67 Correct 19 ms 3412 KB Correct
68 Correct 14 ms 1496 KB Correct
69 Correct 18 ms 1244 KB Correct
70 Correct 19 ms 2772 KB Correct
71 Correct 18 ms 2772 KB Correct
72 Correct 18 ms 2776 KB Correct
73 Correct 65 ms 3672 KB Correct
74 Correct 10 ms 1508 KB Correct
75 Correct 65 ms 4004 KB Correct
76 Correct 27 ms 2776 KB Correct
77 Correct 0 ms 344 KB Correct
78 Correct 90 ms 4128 KB Correct
79 Correct 84 ms 3996 KB Correct
80 Correct 74 ms 4096 KB Correct
81 Correct 13 ms 1496 KB Correct
82 Correct 13 ms 1628 KB Correct
83 Correct 13 ms 1500 KB Correct
84 Correct 6 ms 980 KB Correct
85 Incorrect 23 ms 2664 KB User solution is incorrect
86 Halted 0 ms 0 KB -