Submission #1010503

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010503		vjudge1	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	18 ms	5184 KiB

Main

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
//using namespace __gnu_pbds;
 
#define int long long
#define mod 1000000007
#define base 7001
#define base2 757
// #define pi acos(-1)
#define double long double
//#define ordered_set tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update>
//#define ordered_multiset tree<int, null_type, less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
 
#pragma GCC optimize("O3,Ofast,unroll-loops")
#pragma GCC target("avx2,sse3,sse4,avx")
 
constexpr int maxn = 1000001;
const int N = 1 << (int)(ceil(log2(maxn)));
 
int n, a[maxn], b[maxn];
int prf[maxn], suf[maxn];
 
signed main()
{
    cin.tie(0) -> sync_with_stdio(0);
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    for (int i = n; i > 0; i--)
    {
        suf[i] = suf[i + 1];
        suf[i] += max(a[i + 1] - a[i] + 1, 0ll);
    }
    for (int i = 1; i <= n; i++)
    {
        prf[i] = prf[i - 1];
        prf[i] += max(a[i - 1] - a[i] + 1, 0ll);
    }
    int mn = LLONG_MAX;
 
    for (int i = 1; i <= n; i++)
    {
        int idx = i, jdx = i;
        mn = min(mn, max(suf[jdx], prf[idx]));
    }
    cout << mn;
}

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