Submission #633147

#	Time	Username	Problem	Language	Result	Execution time	Memory
633147		a_aguilo	Hacker (BOI15_hac)	C++14	0 / 100	1080 ms	852 KiB

hac

#include<bits/stdc++.h>

using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;

vi pre, computers;
int N;

int calcInterval(int left, int right){
    if(left > right) return pre[N-1] - (pre[left]-pre[right]);
    return pre[right] - pre[left];
}

int main(){
    cin >> N;
    computers = vi(N);
    pre = vi(N);
    cin >> computers[0];
    pre[0] = computers[0];
    for(int i = 1; i < N; ++i){
        cin>> computers[i];
        pre[i] = pre[i-1] + computers[i];
    }
    int length = N/2 + N%2;
    int ans = 0;
    for(int start = 0; start < N; ++start){
        int val = calcInterval((start-1 + N)%N, (start + length-1)%N);
        for(int left = 0; left < N; ++left){
            int right =  (left + length)%N ;
            if ((left < start  and right>= start) or (right >= start and left > right)) val = min(val, calcInterval(left, right));
        }
        //cout << start << " " << val << endl;
        ans = max(ans, val);
    }
    cout << ans << endl;
    return 0;
}

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