Submission #964595

#	Time	Username	Problem	Language	Result	Execution time	Memory
964595		Alihan_8	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	25 ms	7188 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define ar array
#define pb push_back
#define ln '\n'
#define int long long

using i64 = long long;

template <class F, class _S>
bool chmin(F &u, const _S &v){
    bool flag = false;
    if ( u > v ){
        u = v; flag |= true;
    }
    return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
    bool flag = false;
    if ( u < v ){
        u = v; flag |= true;
    }
    return flag;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n; cin >> n;
    vector <int> d(n - 1);
    int lst = -1;
    for ( int i = 0; i < n; i++ ){
        int x; cin >> x;
        if ( lst != -1 ){
            d[i - 1] = x - lst;
        } lst = x;
    }
    vector <int> pf(n), sf(n);
    for ( int i = 0; i + 1 < n; i++ ){
        pf[i + 1] = pf[i] + min(0LL, d[i] - 1);
    }
    for ( int i = n - 2; i >= 0; i-- ){
        sf[i] = sf[i + 1] + max(0LL, d[i] + 1);
    }
    int opt = 1e18;
    for ( int i = 0; i < n; i++ ){
        chmin(opt, max(sf[i], -pf[i]));
    }
    cout << opt;

    cout << '\n';
}

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