제출 #830417

#제출 시각아이디문제언어결과실행 시간메모리
830417RaresFelixGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
100 / 100
70 ms6984 KiB
#include <bits/stdc++.h> using namespace std; const int MN = 200071; using ll = long long; ll n, A[MN], St[MN], Dr[MN]; int main() { cin >> n; for(int i = 1; i <= n; ++i) { cin >> A[i]; } for(int i = n; i >= 1; --i) A[i] -= A[i - 1]; for(int i = 1; i < n; ++i) A[i] = A[i + 1]; --n; ll s = 0; for(int i = 1; i <= n; ++i) { s += max(1 - A[i], 0ll); St[i] = s; } s = 0; for(int i = n; i >= 1; --i) { s += max(A[i] + 1, 0ll); Dr[i] = s; } ll re = min(St[n], Dr[1]); for(int i = 1; i <= n; ++i) { re = min(re, max(St[i], Dr[i + 1])); } cout << re << "\n"; return 0; }
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