제출 #1032109

#제출 시각아이디문제언어결과실행 시간메모리
1032109juicyGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
100 / 100
22 ms7008 KiB
#include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include "debug.h" #else #define debug(...) 42 #endif const int N = 2e5 + 5; const long long inf = 1e18; int n; int a[N], d[N]; long long pf[N], sf[N]; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cin >> n; for (int i = 1; i <= n; ++i) { cin >> a[i]; } for (int i = 1; i < n; ++i) { d[i] = a[i] - a[i + 1]; } for (int i = 1; i < n; ++i) { pf[i] = pf[i - 1] + max(0, d[i] + 1); } for (int i = n - 1; i >= 1; --i) { sf[i] = sf[i + 1] + max(0, -d[i] + 1); } long long res = inf; for (int i = 1; i <= n; ++i) { res = min(res, max(pf[i - 1], sf[i])); } cout << res; return 0; }
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