Submission #706127

#	Time	Username	Problem	Language	Result	Execution time	Memory
706127		becaido	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	29 ms	6988 KiB

Main

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 2e5 + 5;

int n;
int a[SIZE], d[SIZE];
ll ans, pre[SIZE], suf[SIZE];

void solve() {
    cin >> n;
    FOR (i, 1, n) cin >> a[i];
    FOR (i, 1, n) d[i] = a[i] - a[i - 1];
    FOR (i, 1, n) pre[i] = pre[i - 1] + max(0, 1 - d[i]);
    for (int i = n; i >= 1; i--) suf[i] = suf[i + 1] + max(0, d[i] + 1);
    ans = LLONG_MAX;
    FOR (i, 1, n) ans = min(ans, max(pre[i], suf[i + 1]));
    cout << ans << '\n';
}

int main() {
    Waimai;
    solve();
}

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