oj.uz

Submission #1094397

# Submission time Handle Problem Language Result Execution time Memory
1094397 2024-09-29T14:48:44 Z epicci23 Sprinklers (CEOI24_sprinklers) C++17
9 / 100
 59 ms 5972 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 get = [&](int l,int r){
    if(l>r) return -1LL;
    int it = upper_bound(all(b),r)-b.begin();
    int it2 = lower_bound(all(b),l)-b.begin();
    return it-it2;
  };

  auto check = [&](int pow)->pair<bool,vector<char>>{
    int p=0;
    vector<char> res(n,'L');
    for(int i=0;i<m;){

      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++;
       if(i==m) return {1,res};
       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++;
        if(i==m) return {1,res};
        continue;
      }

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


  int l=0,r=(int)1e10;
  while(l<r){
    int m=(l+r)/2;
    if(check(m).first) r=m;
    else l=m+1;
  }  
  if(r==(int)1e10) cout << -1 << '\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 1 ms 344 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 9 ms 2264 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 9 ms 2268 KB Correct
5 Correct 8 ms 2268 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 1 ms 348 KB Correct
8 Correct 2 ms 900 KB Correct
9 Correct 0 ms 452 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 12 ms 2464 KB Correct
3 Correct 3 ms 940 KB Correct
4 Correct 29 ms 5840 KB Correct
5 Correct 30 ms 5840 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 31 ms 5904 KB Correct
9 Correct 34 ms 5912 KB Correct
10 Correct 59 ms 5972 KB Correct
11 Correct 13 ms 2332 KB Correct
12 Correct 15 ms 3448 KB Correct
13 Correct 38 ms 4764 KB Correct
14 Correct 34 ms 4968 KB Correct
15 Correct 26 ms 4052 KB Correct
16 Correct 37 ms 4696 KB Correct

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Incorrect 0 ms 348 KB User solution is worse than jury's solution
4 Halted 0 ms 0 KB -

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Incorrect 11 ms 2680 KB User solution is worse than jury's solution
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 9 ms 2264 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 9 ms 2268 KB Correct
6 Correct 8 ms 2268 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 1 ms 348 KB Correct
9 Correct 2 ms 900 KB Correct
10 Correct 0 ms 452 KB Correct
11 Correct 12 ms 2464 KB Correct
12 Correct 3 ms 940 KB Correct
13 Correct 29 ms 5840 KB Correct
14 Correct 30 ms 5840 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 31 ms 5904 KB Correct
18 Correct 34 ms 5912 KB Correct
19 Correct 59 ms 5972 KB Correct
20 Correct 13 ms 2332 KB Correct
21 Correct 15 ms 3448 KB Correct
22 Correct 38 ms 4764 KB Correct
23 Correct 34 ms 4968 KB Correct
24 Correct 26 ms 4052 KB Correct
25 Correct 37 ms 4696 KB Correct
26 Incorrect 0 ms 348 KB User solution is worse than jury's solution
27 Halted 0 ms 0 KB -