Submission #838668

#	Time	Username	Problem	Language	Result	Execution time	Memory
838668		LeVanThuc	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	25 ms	5412 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define p(x,y) pair<ll,ll>(x,y)
#define BIT(i,x) ((x>>i)&1)
#define MASK(x) (1<<x)
#define ld long double
#define __builtin_popcount __builtin_popcountll
#define pll pair<ll,ll>
template<class T1,class T2>
bool maximize(T1 &x,const T2 &y)
{
    if(x<y)
    {
        x=y;
        return 1;
    }
    return 0;
}
template<class T1,class T2>
bool minimize(T1 &x,const T2 &y)
{
    if(x>y)
    {
        x=y;
        return 1;
    }
    return 0;
}
void online()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
#ifdef thuc
    freopen("input.INP","r",stdin);
    freopen("output.OUT","w",stdout);
#endif
}

const ll N=2e5+10,M=998244353;
ll a[N],n,l[N],r[N],f[N];
int main()
{
    online();
    cin>>n;
    ll ans=1e18;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        f[i]=f[i-1]+max(0ll,a[i-1]+1-a[i]);
    }
    for(int i=n;i>=1;i--)
    {
        minimize(ans,max(f[i],f[i+1]+max(0ll,a[i+1]+1-a[i])));
        f[i]=f[i+1]+max(0ll,a[i+1]+1-a[i]);
    }
    cout<<ans;
}

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