Submission #867177

#	Time	Username	Problem	Language	Result	Execution time	Memory
867177		Yahia_Emara	The short shank; Redemption (BOI21_prison)	C++17	35 / 100	1287 ms	524288 KiB

prison

#include <bits/stdc++.h>
#define pb push_back
#define ctoi(x) int(x-'0')
#define cdv(x,y) (((x)+(y)-1)/(y))
#define LOOP(n) for(int rp=0;rp<(n);rp++)
using namespace std;
typedef long long ll;
typedef long double dl;
const int SZ=2e5+7;
int l[SZ],n,d,t,a[SZ],f[SZ];
vector<int>v[SZ],w[SZ];
set<int>st;
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin >> n >> d >> t;
    int ans=0;
    for(int i=0;i<n;i++){
        cin >> a[i];
        l[i]=i;
        if(a[i]<=t){
            ans++,st.insert(i);
            w[min(n,i+t-a[i])].pb(i);
        }
        else if(!st.empty()){
            ans++;
            l[i]=*(--st.end());
            for(int j=l[i];j<i;j++)f[j]++,v[j].pb(i);
        }
        for(auto&j:w[i])st.erase(st.find(j));
    }
    LOOP(d){
        int ps=0;
        for(int i=1;i<n;i++){
            if(f[i]>f[ps])ps=i;
        }
        if(!f[ps])break;
        ans-=f[ps];
        for(auto&i:v[ps]){
            while(l[i]<i)f[l[i]++]--;
        }
    }
    cout << ans;
    return 0;
}

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