Submission #311277

#	Time	Username	Problem	Language	Result	Execution time	Memory
311277		sofapuden	Hacker (BOI15_hac)	C++14	20 / 100	503 ms	14072 KiB

hac

#include <bits/stdc++.h>

using namespace std;

int main(){
    int n; cin >> n;
    vector<int> v(n), msa;
    for(auto &x : v)cin >> x;
    int cur = 0;
    for(int i = 0; i < n/2; ++i){
        cur+=v[i];
    }
    msa.push_back(cur);
    int tot = v[n-1];
    for(int i = 0; i < n-1; ++i){
        tot+=v[i];
        cur-=v[i];
        cur+=v[(i+(n/2))%n];
        msa.push_back(cur);
    }
    set<int> S;
    for(int i = 0; i < n/2; ++ i){
        S.insert(msa[i]);
    }
    int ans = *S.rbegin();
    for(int i = 0; i < n-1; ++i){
        S.erase(msa[i]);
        S.insert(msa[(i+(n/2))%n]);
        ans = min(ans,*S.rbegin());
    }
    cout << tot-ans << "\n";
}

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