Submission #383723

#	Time	Username	Problem	Language	Result	Execution time	Memory
383723		danielcm585	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	29 ms	7020 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second

typedef long long ll;
typedef pair<int,int> ii;

const int N = 2e5;
const ll INF = 1e18;
int n;
ll a[N+5], pref[N+2], suff[N+2];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    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]));
        // ans = min(ans,pref[i]+suff[i]);
    }
    cout << ans << '\n';
    return 0;
}

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