Submission #1319782

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319782		pobe	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	0 / 100	0 ms	332 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define int long long
using namespace std;
using namespace __gnu_pbds;
void solve() {
    int n;
    cin >> n;
    vector <int> val(n);
    for (int i = 0; i < n; ++i) {
        cin >> val[i];
    }
    vector <int> prev(n, 0), suf(n, 0);
    for (int i = 1; i < n; ++i) {
        prev[i] += prev[i - 1];
        prev[i] += max(0LL, val[i - 1] - val[i] + 1);
    }
    for (int i = 1; i < n; ++i) {
        prev[i] += prev[i - 1];
        prev[i] += max(0LL, val[i - 1] - val[i] + 1);
    }
    for (int i = n - 2; i >= 0; --i) {
        suf[i] += suf[i + 1];
        suf[i] += max(0LL, val[i + 1] - val[i] + 1);
    }
    int ans = 2e9;
    for (int i = 0; i < n; ++i) {
        ans = min(ans, prev[i] + suf[i]);
    }
    cout << ans << '\n';
}
signed main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int t = 1;
//    cin >> t;
    for (int i = 0; i < t; ++i) {
        solve();
    }
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60