Submission #527698

#	Time	Username	Problem	Language	Result	Execution time	Memory
527698		knightron0	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	26 ms	6892 KiB

Main

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

#define pb push_back
#define fr first
#define sc second
#define clr(a, x) memset(a, x, sizeof(a))
#define dbg(x) cout<<"("<<#x<<"): "<<x<<endl;
#define printvector(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout<<*it<<" "; cout<<endl;
#define all(v) v.begin(), v.end()
#define lcm(a, b) (a * b)/__gcd(a, b)
#define int long long int
#define printvecpairs(vec) for(auto it: vec) cout<<it.fr<<' '<<it.sc<<endl;
#define endl '\n'
#define float long double

const int MOD = 1e9 + 7;
const int INF = 2e15;
const int MAXN = 1e5 + 5;

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    #endif
    int n;
    cin>>n;
    int a[n+4];
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    int pref[n+4], suff[n+4];
    pref[0] = suff[n-1] = 0;
    for(int i=1;i<n;i++){
        pref[i] = pref[i-1];
        pref[i] += max((int)0, a[i-1]-a[i]+1);
    }
    for(int i=n-2;i>=0;i--){
        suff[i] = suff[i+1];
        suff[i] += max((int)0, a[i+1]-a[i]+1);
    }
    int ans = LLONG_MAX;
    for(int i=0;i<n;i++){
        ans = min(ans, max(pref[i], suff[i]));
    }
    cout<<ans<<endl;
    return 0;
}

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