제출 #771180

#제출 시각아이디문제언어결과실행 시간메모리
771180Trisanu_DasGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
0 / 100
1 ms340 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
  int n; cin >> n;
  int a[n], p[n], s[n]; for(int i = 0; i < n; i++) cin >> a[i];
  p[0] = 0ll; for(int i = 1; i < n; i++) p[i] = p[i - 1] + max(0ll, a[i - 1] - a[i] + 1);
  s[n - 1] = 0ll; for(int i = n - 2; i > -1; i--) s[i] = s[i + 1] + max(0ll, a[i + 1] - a[i] + 1);
  int ans = INT_MAX;
  for(int i = 0; i < n; i++) ans = min(ans, max(p[i], s[i]));
  cout << ans << '\n';
}
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