Submission #661344

#	Time	Username	Problem	Language	Result	Execution time	Memory
661344		bebra	Krov (COCI17_krov)	C++17	70 / 140	1598 ms	596 KiB

krov

#include <bits/stdc++.h>
using namespace std;

#define dbg(x) cerr << #x << ": " << x << endl;


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<int> a(n);
    int max_value = 0;
    for (auto& x : a) {
        cin >> x;
        max_value = max(max_value, x);
    }
    auto g = [&](int idx, int value) {
        long long res = 0;
        for (int i = 0; i < n; ++i) {
            res += abs(a[i] - (value - abs(i - idx)));
        }
        return res;
    };
    auto f = [&](int i){
        int l = max(i + 1, n - i);
        int r = 1e9 + 5;
        while (l != r - 1) {
            int m = (l + r) / 2;
            if (g(i, m) > g(i, m + 1)) {
                l = m;
            } else {
                r = m;
            }
        }
        long long curr_min = min(g(i, l), g(i, r));
        return curr_min;
    };
    int l = 0;
    int r = n;
    while (l != r - 1) {
        int m = (l + r) / 2;
        if (f(m) > f(m + 1)) {
            l = m;
        } else {
            r = m;
        }
    }
    long long ans = 1e18;
    for (int i = max(0, l - 1000); i < min(n, r + 1000); ++i) {
        ans = min(ans, f(i));
    }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14