Submission #1140547

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140547		Muhammad_Aneeq	Sprinklers (CEOI24_sprinklers)	C++20	26 / 100	2089 ms	1708 KiB

Main

/*
بسم الله الرحمن الرحيم
Author:
                                                    (:Muhammad Aneeq:)
*/

#include <iostream>
#include <vector>
#include <algorithm>
#warning check the output
using namespace std;
int const N=1e5+10;
int s[N],f[N];
char ans[N]={};
int n,m;
bool vis[N]={};
bool check(int ran)
{
    int dif[m+10]={};
    for (int i=0;i<n;i++)
    {
        if (ans[i]=='L')
        {
            int l=lower_bound(f,f+m,s[i]-ran)-f;
            int r=upper_bound(f,f+m,s[i])-f;
            dif[l]++;
            dif[r]--;
        }
        else
        {
            int l=lower_bound(f,f+m,s[i])-f;
            int r=upper_bound(f,f+m,s[i]+ran)-f;
            dif[l]++;
            dif[r]--;
        }
    }
    for (int i=1;i<m;i++)
        dif[i]+=dif[i-1];
    for(int i=0;i<m;i++)
    {
        if (dif[i]==0)
            return 0;
    }
    return 1;
}
inline void solve()
{
    cin>>n>>m;
    for (int i=0;i<n;i++)
        cin>>s[i];
    for (int i=0;i<m;i++)
        cin>>f[i];
    bool subt2=(n%3==0);
    for(int i=0;i<n;i+=3)
    {
        if (s[i]==s[i+1]&&s[i]==s[i+2])
            continue;
        else
            subt2=0;
    }
    if (subt2)
    {
        for (int i=0;i<n;i+=3)
        {
            ans[i]=ans[i+1]='L';
            ans[i+2]='R';
        }
        int st=-1,en=1e9+10;
        while (st+1<en)
        {
            int mid=(st+en)/2;
            if (check(mid))
                en=mid;
            else
                st=mid;
        }
        if (check(en)==0)
        {
            cout<<-1<<endl;return;
        }
        cout<<en<<endl;
        for (int i=0;i<n;i++)
            cout<<ans[i];
        cout<<endl;
        return;
    }
    int co=1e9+10;
    string z;
    for (int i=0;i<(1<<n);i++)
    {
        for (int j=0;j<n;j++)
        {
            if ((1<<j)&i)
                ans[j]='R';
            else
                ans[j]='L';
        }
        int st=-1,en=1e9+10;
        while (st+1<en)
        {
            int mid=(st+en)/2;
            if (check(mid))
                en=mid;
            else
                st=mid;
        }
        if (check(en)==0)
            continue;
        if (en<co)
        {
            co=en;
            z="";
            for (int i=0;i<n;i++)
                z+=ans[i];
        }
    }
    if (co>1e9)
    {
        cout<<-1<<endl;return;
    }
    cout<<co<<endl;
    cout<<z<<endl;
}
int main()
{
        ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        int t=1;
        for (int i=1;i<=t;i++)
        {
                solve();
        }
}

Compilation message (stderr)

Main.cpp:10:2: warning: #warning check the output [-Wcpp]
   10 | #warning check the output
      |  ^~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 17 / 17
• Subtask 4: 0 / 27
• Subtask 5: 0 / 47