Submission #484942

#	Time	Username	Problem	Language	Result	Execution time	Memory
484942		ak2006	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	24 ms	6928 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
using vs = vector<string>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
    fast;
}
int main()
{
    setIO();
    int n;
    cin>>n;
    vl a(n + 1);
    for (int i = 1;i<=n;i++)cin>>a[i];
    vl pref(n + 1),suff(n + 2);
    for (int i = 2;i<=n;i++)pref[i] = pref[i - 1] + max(0ll,a[i - 1] - a[i] + 1);
    for (int i = n - 1;i>=1;i--)suff[i] = suff[i + 1] + max(0ll,a[i + 1] - a[i] + 1);
    ll ans = inf;
    for (int i = 1;i<=n;i++)
        ans = min(ans,max(pref[i],suff[i]));
    cout<<ans;
    return 0;
}

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