Submission #915372

#	Time	Username	Problem	Language	Result	Execution time	Memory
915372		HorizonWest	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	0 / 100	1 ms	452 KiB

Main

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

#define endl '\n'
#define db double
#define ll __int128
#define int long long
#define pb push_back
#define fs first
#define sd second
#define Mod long(1e9 + 7)
#define all(x) x.begin(), x.end()
#define unvisited long(-1)
#define Eps double(1e-9)
#define _for(i, n) for(int i = 0; i < (n); i++)
#define dbg(x) cout << #x ": " << x << endl;

const int Max = 1e6 + 7, Inf = 1e9 + 7;

void print(bool x) { cout << (x ? "YES" : "NO") << endl; }

string tostring (__int128 x)
{
    string ans = "";
    while(x > 0)
    {
        ans += (x % 10 + '0');
        x /= 10;
    }
    reverse(all(ans));
    return ans;
}

void solve()
{
    int n; cin >> n; 
    vector <int> v(n), s1(n), s2(n); 
    for(auto& u : v) cin >> u; 
    
    for(int i = 0; i < n-1; i++)
    {
       // cout << abs(v[i] - v[i+1]) << " ";
        if(v[i] >= v[i+1])
            s1[i+1] += abs(v[i] - v[i+1]) + 1;
        s1[i+1] += s1[i];
    }

    for(int i = n-1; i > 0; i--)
    {
        if(v[i] >= v[i-1])
            s2[i-1] += abs(v[i] - v[i-1]) + 1;
        s2[i-1] += s2[i];
    }

    int ans = Inf;

    for(int i = 0; i < n; i++)
    {
        int a = 0, b = 0, op1 = 0, op2 = 0;

        if(i != 0)
        {
            a = s1[i-1];
            if(v[i] <= v[i-1]) op1 = abs(v[i] - v[i-1]) + 1; 
        }
        if(i + 1 != n) op1 += max(0LL, (v[i+1] + s2[i+1] + 1) - (a + op1 + v[i]));

        if(i != n - 1)
        {
            b = s2[i+1];
            if(v[i] <= v[i+1]) op2 = abs(v[i] - v[i+1]) + 1;
        }
        if(i != 0) op2 += max(0LL, (v[i-1] + s1[i-1] + 1) - (b + op2 + v[i]));

        ans = min(ans, a + b + min(op1, op2));
    }

    /*for(int i = 0; i < n; i++) cerr << s1[i] << " ";
    cerr << endl;
    for(int i = 0; i < n; i++) cerr << s2[i] << " ";
    cerr << endl;*/

    cout << ans << endl;
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int Q = 1; //cin >> Q;

    while (Q--)
    {
        solve();
    }

    return 0;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60