Submission #1256115

#	Time	Username	Problem	Language	Result	Execution time	Memory
1256115		rajinnyo	Watching (JOI13_watching)	C++20	100 / 100	101 ms	16396 KiB

watching

#include<bits/stdc++.h>
using namespace std;
// JANGAN LUPA CEK PERLU LL NGGAK
#define pb push_back
#define pii pair<int,int>
#define fi first
#define inf INT_MAX
#define se second
#define miku ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
vector<int>a;
signed main(){
    miku
    int n,p,q;cin>>n>>p>>q;
    q=min(n,q);
    a.assign(n+1,0);
    for(int i=1;i<=n;i++)cin>>a[i];
    sort(a.begin()+1,a.end());
    int l=1,r=a[n]-a[1]+1;
    int ans=0;
    while(l<=r){
        int mid=(l+r)/2;
        int j=1;
        int mini=inf;
        int dp[n+10][q+10];
        memset(dp,0,sizeof(dp));
        int deketk=1,deket2k=1;
        for(int i=1;i<=n;i++){
            while(a[i]-a[deketk]+1>mid)deketk++;
            while(a[i]-a[deket2k]+1>2*mid)deket2k++;
            dp[i][0]=dp[deketk-1][0]+1;
            for(int j=1;j<=q;j++){
                dp[i][j]=dp[deket2k-1][j-1];
                dp[i][j]=min(dp[deketk-1][j]+1,dp[i][j]);
                // if(mid==2) cout<<i<<" "<<j<<" "<<dp[binser(i,2*mid)-1][j-1]<<" "<<dp[binser(i,2*mid)-1][j-1]<<endl;
            }
        }
        for(int i=0;i<=q;i++) mini=min(mini,dp[n][i]);
        // cout<<mid<<' '<<mini<<endl;
        if(mini<=p){
            r=mid-1;
            ans=mid;
        }
        else l=mid+1;
    }
    cout<<ans;
}

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