Submission #964272

#	Time	Username	Problem	Language	Result	Execution time	Memory
964272		Unforgettablepl	Watching (JOI13_watching)	C++17	100 / 100	487 ms	63320 KiB

watching

#include <bits/stdc++.h>
using namespace std;

#define int long long
typedef long long ll;

pair<int,int> DP[2001][2001];
int arr[2001];
int n,p,q;

bool check(int w){
    for(auto&i:DP)for(auto&j:i)j={-1e15,0ll};
    for(auto&i:DP[0])i.first=0;
    for(int i=1;i<=n;i++){
        for(int j=0;j<=q;j++){
            if(DP[i-1][j].second>=arr[i])DP[i][j]=DP[i-1][j];
            if(j!=0)DP[i][j]=max(DP[i][j],{DP[i-1][j-1].first,arr[i]+w-1});
            DP[i][j]=max(DP[i][j],{DP[i-1][j].first-1,arr[i]+2*w-1});
        }
    }
    return -DP[n][q].first > p;
}


int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> q >> p;
    for(int i=1;i<=n;i++)cin>>arr[i];
    if(p+q>=n){
        cout << "1\n";
        return 0;
    }
    sort(arr+1,arr+1+n);
    int ans = 0;
    for(int jump=536870912;jump;jump/=2){
        if(check(ans+jump))ans+=jump;
    }
    ans++;
    cout << ans << '\n';
}

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