제출 #329980

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
329980		Sho10	Watching (JOI13_watching)	C++14	100 / 100	103 ms	23276 KiB

watching

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod (10*10*10*10*10*10*10*10*10+7)
#define PI 3.14159265359
#define MAXN 100005
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
int n,p,q,a[2005],dp[2005][5005];
int check(int x){
int l=1,r=1;
for(int i=1;i<=n;i++)
{
    while(a[l]<a[i]-x+1){
        l++;
    }
    while(a[r]<a[i]-2*x+1){
        r++;
    }
    for(int j=0;j<=p;j++)
    {
        dp[i][j]=INF;
        if(j){
            dp[i][j]=dp[l-1][j-1];
        }
        dp[i][j]=min(dp[r-1][j]+1,dp[i][j]);
    }
}
return (dp[n][p]<=q);
}
int32_t main(){
CODE_START;
cin>>n>>p>>q;
for(int i=1;i<=n;i++)
{
    cin>>a[i];
}
if(p+q>=n){
    rc(1);
}
sort(a+1,a+n+1);
int l=1,r=1e9,res=0;
while(l<=r){
    int mid=(l+r)/2;
    if(check(mid)){
        res=mid;
        r=mid-1;
    }else l=mid+1;
}
cout<<res<<endl;
}

• Subtask 1: 50 / 50
• Subtask 2: 50 / 50