Submission #1031637

#	Time	Username	Problem	Language	Result	Execution time	Memory
1031637		underwaterkillerwhale	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	17 ms	7024 KiB

Main

#include <bits/stdc++.h>
#define se              second
#define fs              first
#define mp              make_pair
#define pb              push_back
#define ll              long long
#define ii              pair<ll,ll>
#define ld              long double
#define SZ(v)           (int)v.size()
#define ALL(v)          v.begin(), v.end()
#define bit(msk, i)     ((msk >> i) & 1)
#define iter(id, v)     for(auto id : v)
#define rep(i,m,n)      for(int i=(m); i<=(n); i++)
#define reb(i,m,n)      for(int i=(m); i>=(n); i--)
using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now().time_since_epoch().count());
ll Rand(ll l, ll r) { return uniform_int_distribution<ll> (l, r)(rd); }

const int N = 2e5 + 7;
const int Mod = 1e9 + 7;
const int szBL = 320;
const ll INF = 1e18;
const int BASE = 137;

int n, Q;
ll a[N];
ll pret[N], suft[N];

void solution () {
    cin >> n;
    rep (i, 1, n) cin >> a[i];
    rep (i, 1, n) {
        pret[i] = pret[i - 1] + max(0LL, a[i] + 1- a[i + 1]);
    }
    reb (i, n, 1) {
        suft[i] = suft[i + 1] + max(0LL, a[i] + 1 - a[i - 1]);
    }
    ll res = INF;
    rep (i, 0, n) {
        res = min(res, pret[i] + max(0LL, suft[i + 2] - pret[i]));
    }
    cout << res <<"\n";
}

#define file(name) freopen(name".inp", "r", stdin); \
freopen(name".out", "w", stdout);

int main () {
//    file("c");
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    ll num_Test = 1;
//    cin >> num_Test;
    while(num_Test--)
        solution();
}

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