Submission #1134910

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134910		8pete8	Sprinklers (CEOI24_sprinklers)	C++20	0 / 100	289 ms	7236 KiB

Main

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=1e9+7,mxn=2e5+5,inf=1e18,minf=-1e18,lg=30;
//#undef int
int n,k,m,w,h,l;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}
int F[mxn+10],S[mxn+10],mid,di[mxn+10];
bool check(){
    set<int>have;
    for(int i=1;i<=m;i++)have.insert(F[i]);
    for(int i=1;i<=n;i++){
        if(have.empty())return 1;
        int mn=(*have.begin());
        if(mn<S[i]-mid)return 0;
        //forced cases
        if(mn>=S[i])di[i]=1;
        else if((S[i]-mid)<=mn&&(S[i+1]-mid)>mn)di[i]=0;
        else{
            auto it=have.upper_bound(S[i]);
            //if no flower are in between LR
            if(it==have.end()||(*it)>=S[i+1])di[i]=0;
            else di[i]=1;
        }
        if(di[i]==0){
            while(have.size()&&(*have.begin())>=(S[i]-mid)&&(*have.begin())<=S[i])have.erase(have.begin());
        }
        else{
            auto it=have.lb(S[i]);
            while(it!=have.end()&&(*it)<=S[i]+mid)it=have.erase(it);
        }
    }
    if(have.size())return 0;
    return 1;
}
int32_t main(){
    fastio
    cin>>n>>m;
    for(int i=1;i<=n;i++)cin>>S[i];
    S[n+1]=inf;
    for(int i=1;i<=m;i++)cin>>F[i];
    int l=0,r=1e9,ans=inf;
    /*
    while(l<=r){
        mid=l+(r-l)/2;
        if(check())r=mid-1,ans=min(ans,mid);
        else l=mid+1;
    }*/ 
    int change=0;
    for(mid=0;mid<=8;mid++){
        int x=check();
        if(x)ans=min(ans,mid);
        change|=check();
        if(change!=x)assert(0);
    }
    if(ans==inf)return (cout<<-1),0;
    cout<<ans<<'\n';
    mid=ans;
    check();
    for(int i=1;i<=n;i++)cout<<((di[i])?'R':'L');
}
/*

*/

Compilation message (stderr)

Main.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:38:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   38 | void setIO(string name){
      |                       ^
Main.cpp:44:12: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   44 | bool check(){
      |            ^
Main.cpp:71:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   71 | int32_t main(){
      |              ^
Main.cpp: In function 'void setIO(std::string)':
Main.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen((name+".in").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen((name+".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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