Submission #1143482

#	Time	Username	Problem	Language	Result	Execution time	Memory
1143482		dpsaveslives	Hacker (BOI15_hac)	C++20	0 / 100	0 ms	328 KiB

hac

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 5e5+5;
int arr[MAXN],pref[MAXN];
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N; cin >> N;
    for(int i = 1;i<=N;++i){
        cin >> arr[i];
        pref[i] = pref[i-1]+arr[i];
    }
    int len = (N+1)/2, ans = 0;
    for(int i = 1;i<=N;++i){
        int curmin = -1;
        if(i+len-1 <= N){
            curmin = pref[i+len-1]-pref[i-1];
        }
        else{
            curmin = pref[N]-pref[i-1]+pref[len-(N-i+1)];
        }
        //cout << i << " " << curmin << " ";
        if(i-len >= 0){
            curmin = min(curmin,pref[i]-pref[i-len]);
            //cout << pref[i]-pref[i-len] << "\n";
        }
        else{
            curmin = min(curmin,pref[i]+pref[N]-pref[N-(len-i)]);
            //cout << pref[i]+pref[N]-pref[N-(len-i)] << "\n";
        }
        ans = max(ans,curmin);
    }
    cout << ans << "\n";
    return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 40