Submission #1106199

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106199		alexdd	The short shank; Redemption (BOI21_prison)	C++17	15 / 100	2097 ms	10900 KiB

prison

#include <bits/stdc++.h>
using namespace std;
#define int long long
int n,d,lim;
int t[2000005];
bool blocat[2000005];
int tole[2000005];
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>d>>lim;
    for(int i=1;i<=n;i++)
    {
        cin>>t[i];
        tole[i] = n+1;
        for(int j=i;j>0;j--)
        {
            if(t[j] + (i-j) <= lim)
            {
                tole[i] = j;
                break;
            }
        }
    }
    for(int pas=1;pas<=d;pas++)
    {
        int mxm=0,unde=-1;
        for(int i=1;i<=n;i++)
        {
            int cnt=0;
            for(int j=i+1;j<=n;j++)
                if(tole[j]<=i)
                    cnt++;
            if(cnt>mxm)
            {
                mxm = cnt;
                unde = i;
            }
        }
        if(unde==-1)
            break;
        blocat[unde]=1;
        for(int i=unde+1;i<=n;i++)
        {
            if(tole[i]<=unde)
            {
                tole[i] = n+1;
            }
        }
    }
    int rez=0;
    for(int i=1;i<=n;i++)
    {
        for(int j=i;j>0;j--)
        {
            if(t[j] + (i-j) <= lim)
            {
                rez++;
                break;
            }
            if(blocat[j-1])
                break;
        }
    }
    cout<<rez;
    return 0;
}
/*
pentru fiecare pozitie i ne intereseaza doar cea mai din dreapta pozitie j aflata in stanga ei care respecta
j <= i
t[j] + (i-j) <= lim
t[j] - j <= lim - i


*/

• Subtask 1: 15 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 25
• Subtask 6: 0 / 20