oj.uz

Submission #1094538

# Submission time Handle Problem Language Result Execution time Memory
1094538 2024-09-29T19:57:20 Z epicci23 Sprinklers (CEOI24_sprinklers) C++17
53 / 100
 99 ms 6028 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]]){
        p--;
        continue;
      }
      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==sz(f)-2) 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]]){
        p++;
        continue;
      }
      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 1500 KB Correct
6 Correct 0 ms 344 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 11 ms 1504 KB Correct
3 Correct 5 ms 844 KB Correct
4 Correct 58 ms 4040 KB Correct
5 Correct 58 ms 4020 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 77 ms 4152 KB Correct
9 Correct 76 ms 4112 KB Correct
10 Correct 83 ms 4020 KB Correct
11 Correct 13 ms 1500 KB Correct
12 Correct 29 ms 2312 KB Correct
13 Correct 65 ms 3736 KB Correct
14 Correct 64 ms 3764 KB Correct
15 Correct 26 ms 2772 KB Correct
16 Correct 67 ms 3764 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 348 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 1 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 0 ms 348 KB Correct
12 Correct 0 ms 348 KB Correct
13 Correct 1 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 0 ms 348 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 15 ms 1492 KB Correct
3 Correct 52 ms 2772 KB Correct
4 Correct 42 ms 2776 KB Correct
5 Correct 42 ms 2744 KB Correct
6 Correct 45 ms 2776 KB Correct
7 Correct 75 ms 4004 KB Correct
8 Correct 44 ms 2776 KB Correct
9 Correct 47 ms 2776 KB Correct
10 Correct 78 ms 4024 KB Correct
11 Correct 44 ms 4564 KB Correct
12 Correct 0 ms 344 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 15 ms 2288 KB Correct
15 Correct 15 ms 2444 KB Correct
16 Correct 14 ms 2520 KB Correct
17 Correct 15 ms 4188 KB Correct
18 Correct 16 ms 4444 KB Correct
19 Correct 18 ms 4508 KB Correct
20 Correct 31 ms 4312 KB Correct
21 Correct 32 ms 4312 KB Correct
22 Correct 25 ms 4056 KB Correct
23 Correct 26 ms 4056 KB Correct
24 Correct 67 ms 5168 KB Correct
25 Correct 24 ms 4696 KB Correct
26 Correct 15 ms 2264 KB Correct
27 Correct 16 ms 1748 KB Correct
28 Correct 20 ms 3800 KB Correct
29 Correct 18 ms 3544 KB Correct
30 Correct 19 ms 3820 KB Correct
31 Correct 66 ms 4892 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 1500 KB Correct
7 Correct 0 ms 344 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 11 ms 1504 KB Correct
12 Correct 5 ms 844 KB Correct
13 Correct 58 ms 4040 KB Correct
14 Correct 58 ms 4020 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 77 ms 4152 KB Correct
18 Correct 76 ms 4112 KB Correct
19 Correct 83 ms 4020 KB Correct
20 Correct 13 ms 1500 KB Correct
21 Correct 29 ms 2312 KB Correct
22 Correct 65 ms 3736 KB Correct
23 Correct 64 ms 3764 KB Correct
24 Correct 26 ms 2772 KB Correct
25 Correct 67 ms 3764 KB Correct
26 Correct 0 ms 344 KB Correct
27 Correct 0 ms 348 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 1 ms 348 KB Correct
33 Correct 0 ms 348 KB Correct
34 Correct 0 ms 348 KB Correct
35 Correct 0 ms 348 KB Correct
36 Correct 1 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 0 ms 348 KB Correct
43 Correct 0 ms 348 KB Correct
44 Correct 15 ms 1492 KB Correct
45 Correct 52 ms 2772 KB Correct
46 Correct 42 ms 2776 KB Correct
47 Correct 42 ms 2744 KB Correct
48 Correct 45 ms 2776 KB Correct
49 Correct 75 ms 4004 KB Correct
50 Correct 44 ms 2776 KB Correct
51 Correct 47 ms 2776 KB Correct
52 Correct 78 ms 4024 KB Correct
53 Correct 44 ms 4564 KB Correct
54 Correct 0 ms 344 KB Correct
55 Correct 0 ms 348 KB Correct
56 Correct 15 ms 2288 KB Correct
57 Correct 15 ms 2444 KB Correct
58 Correct 14 ms 2520 KB Correct
59 Correct 15 ms 4188 KB Correct
60 Correct 16 ms 4444 KB Correct
61 Correct 18 ms 4508 KB Correct
62 Correct 31 ms 4312 KB Correct
63 Correct 32 ms 4312 KB Correct
64 Correct 25 ms 4056 KB Correct
65 Correct 26 ms 4056 KB Correct
66 Correct 67 ms 5168 KB Correct
67 Correct 24 ms 4696 KB Correct
68 Correct 15 ms 2264 KB Correct
69 Correct 16 ms 1748 KB Correct
70 Correct 20 ms 3800 KB Correct
71 Correct 18 ms 3544 KB Correct
72 Correct 19 ms 3820 KB Correct
73 Correct 66 ms 4892 KB Correct
74 Correct 11 ms 2536 KB Correct
75 Correct 63 ms 5932 KB Correct
76 Correct 27 ms 4564 KB Correct
77 Correct 0 ms 348 KB Correct
78 Correct 84 ms 6024 KB Correct
79 Correct 99 ms 5956 KB Correct
80 Correct 77 ms 6028 KB Correct
81 Correct 13 ms 2520 KB Correct
82 Correct 13 ms 2520 KB Correct
83 Correct 13 ms 2520 KB Correct
84 Correct 7 ms 1492 KB Correct
85 Incorrect 22 ms 4056 KB User solution is incorrect
86 Halted 0 ms 0 KB -