Submission #1236027

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236027		hamanp87	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	14 ms	6708 KiB

Main

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

//#pragma GCC optimize("03,unroll-loops")
//#pragma GCC target("avx2")
//#pragma GCC target("sse4")

#define all(v) v.begin(),v.end()
#define F first
#define S second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
//#define randi uniform_int_distribution<long long>
#define damoon(v) v.resize(unique(all(v))-v.begin())
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//randi dist(0,10000000000000000);

typedef pair<int,int> pii;
typedef pair<long long,long long> pll;
typedef pair<int,bool> pib;
typedef pair<long long,bool> plb;
typedef pair<int,pii> pip;
typedef pair<pii,int> ppi;
typedef vector<int> veci;
typedef vector<long long> vecl;
typedef vector<bool> vecb;
typedef vector<pii> vecp;
typedef set<int> seti;
typedef set<long long> setl;
typedef set<pii> setp;
typedef map<int,int> mapii;
typedef map<long long,long long> mapll;
typedef map<int,bool> mapib;
typedef map<long long,bool> maplb;

const int inf=1e9,mod=1e9+7,neginf=-1e9;
const double PI=acos(-1);

void solve()
{
    int n;
    cin>>n;
    vecl a(n);
    for(int i=0;i<n;i++)
        cin>>a[i];
    
    vecl dif(n-1),prf(n,0),suf(n,0);
    for(int i=0;i<n-1;i++)
        dif[i]=a[i+1]-a[i];

    for(int i=0;i<n-1;i++)
        prf[i+1]=prf[i]+max(0LL,1-dif[i]);

    for(int i=n-2;i>=0;i--)
        suf[i]=suf[i+1]+max(0LL,dif[i]+1);

    ll ans=LLONG_MAX;
    for(int i=0;i<n;i++)
        ans=min(ans,max(prf[i],suf[i]));

    cout<<ans<<"\n";
}

int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(false);

    //ifstream fin("in.txt");
    //ofstream fout("out.txt");

    int t=1;
    //cin>>t;
    while(t--)
    {
        solve();
    }
}

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