Submission #533310

#	Time	Username	Problem	Language	Result	Execution time	Memory
533310		star_platinum	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	27 ms	8524 KiB

Main

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define mikumywaifu ios_base::sync_with_stdio(0)
#define mudrockmywaifu cin.tie(0)
#define pb push_back
#define ss second
#define ff first
#define mem(i,j) memset(i,j,sizeof(i))
#define pii pair<int,int>
#define pll pair<long,long>
#define lowbit(x) x&-x
const int INF =0x3F3F3F3F;
const ll LINF=4611686018426387903;
ll gcd(ll a,ll b){
    if(b==0) return a;
    a%=b;
    return gcd(b,a);
}
void debug(){
    cout<<"DEBUG :";
    cout<<"\n";
}
/*-----------------------------------------*/

signed main(){
    mikumywaifu;
    mudrockmywaifu;
    int n;
    cin>>n;
    vector<ll>a(n+1),b(n+1);
    for(int i=0;i<n;i++){
        cin>>a[i];
        b[i]=a[i];
    }
    vector<ll> l(n+1),r(n+1);
    l[0]=0,r[n-1]=0;
    for(int i=1;i<n;i++){
        l[i]=l[i-1];
        l[i]+=(a[i]>a[i-1])?0:a[i-1]-a[i]+1;
        
    }
    for(int i=n-2;i>=0;i--){
        r[i]=r[i+1];
        r[i]+=(b[i]>b[i+1])?0:b[i+1]-b[i]+1;
    }
    ll ans=1e18;
    for(int i=0;i<n;i++){
        ans=min(ans,max(l[i],r[i]));
    }
    cout<<ans<<"\n";
}

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