제출 #1110188

#제출 시각아이디문제언어결과실행 시간메모리
1110188LucasLeGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
100 / 100
19 ms8952 KiB
#include <bits/stdc++.h> const int maxn = 1e6 + 5; int n; int a[maxn + 5]; long long pref[maxn + 5], suff[maxn + 5]; void solve() { std::cin >> n; for (int i = 1; i <= n; ++i) std::cin >> a[i]; for (int i = 1; i <= n; ++i) { pref[i] = pref[i - 1]; if (a[i] <= a[i - 1]) pref[i] += a[i - 1] - a[i] + 1; } for (int i = n; i >= 1; --i) { suff[i] = suff[i + 1]; if (a[i] <= a[i + 1]) suff[i] += a[i + 1] - a[i] + 1; } long long ans = 1e15; for (int i = 1; i <= n; ++i) { ans = std::min(ans, std::max(pref[i], suff[i])); } std::cout << ans; } int main() { std::ios_base::sync_with_stdio(false); std::cin.tie(0); int tc = 1; // std::cin >> tc; // init(); while (tc--) solve(); }
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