Submission #1319977

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319977		b_esma101811	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	70 ms	5024 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
void solve() {
    int n;
    cin >> n;
    int a[n + 1];
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    int pref[n + 1];
    pref[1] = 0;
    for(int i = 2; i <= n; i++) {
        pref[i] = pref[i - 1];
        if(a[i - 1] >= a[i]) {
            pref[i] += (a[i - 1] - a[i] + 1);
        }
    }
    int suf[n + 1];
    suf[n] = 0;
    for(int i = n - 1; i >= 1; i--) {
        suf[i] = suf[i + 1];
        if(a[i + 1] >= a[i]) {
            suf[i] += (a[i + 1] - a[i] + 1);
        }
    }
    int ans = 1e18;
    for(int i = 1; i <= n; i++) {
        ans = min({ans, max(pref[i], suf[i])});
    }
    cout << ans << endl;
}
signed main(){
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
}

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