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Submission #1114721

# Submission time Handle Problem Language Result Execution time Memory
1114721 2024-11-19T13:17:25 Z Thunnus Hacker (BOI15_hac) C++17
20 / 100
 279 ms 27736 KB 
#include<bits/stdc++.h>
using namespace std;
using i64 = long long;
#define int i64
#define vi vector<int>
#define vvi vector<vi>
#define vb vector<bool>
#define pii pair<int, int>
#define fi first
#define se second
#define sz(x) (int)(x).size()

signed main(){
    ios_base::sync_with_stdio(false); cin.tie(0);
    int n;
    cin >> n;
    const int SZ = (n + 1) / 2;
    vi a(2 * n);
    for(int i = 0; i < n; i++){
        cin >> a[i];
        a[n + i] = a[i];
    }
    for(int i = 1; i < 2 * n; i++){
        a[i] += a[i - 1];
    }
    
    auto sum = [&](int l, int r) -> int  {
        if(!l) return a[r];
        return a[r] - a[l - 1];
    };

    multiset<int> s;
    vi ans(2 * n, LLONG_MAX);
    for(int i = 0; i < 2 * n; i++){
        if(i + SZ - 1 < 2 * n) s.emplace(sum(i, i + SZ - 1));
        if(i > SZ) s.erase(s.find(sum(i - SZ, i - 1)));
        ans[i] = min(ans[i], *s.begin());
    }

    int res = 0;
    for(int i = 0; i < n; i++){
        res = max(res, min(ans[i], ans[i + n]));
    }
    cout << res << "\n";
    return 0;
}

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 3 ms 660 KB Output is correct
4 Correct 31 ms 4788 KB Output is correct
5 Correct 88 ms 11272 KB Output is correct
6 Correct 124 ms 13904 KB Output is correct
7 Correct 133 ms 16676 KB Output is correct
8 Correct 279 ms 27736 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -