Submission #534155

#	Time	Username	Problem	Language	Result	Execution time	Memory
534155		Biaz	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	111 ms	8516 KiB

Main

#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define fi first
#define se second
#define X first
#define Y second
#define ist insert
typedef long long ll;
//typedef pair<int,int> pii;
using namespace std;
int max(int a,int b){return a>b?a:b;}
int min(int a,int b){return a<b?a:b;}
const int INF=17000000000000000;//2147483647;
const int MOD=998244353;//1000000007;
const int N=200005;
int n;
int a[N],b[N];
int L[N],R[N];
void calc(){
    int s1=0,s2=0;
    for (int i=1;i<=n;i++){
        if (b[i]<=0)
            s1+=-b[i]+1;
        L[i]=s1;
    }
    for (int i=n;i>=1;i--){
        if (b[i]>=0)
            s2+=b[i]+1;
        R[i]=s2;
    }
}
void sol(){
    cin >>n;
    for (int i=1;i<=n;i++)
        cin >>a[i];
    for (int i=1;i<=n;i++)
        b[i]=a[i]-a[i-1];
    calc();
    int ans=INF;
    for (int i=1;i<=n;i++)
        ans=min(ans,max(L[i],R[i+1]));
    cout <<ans<<'\n';

}
signed main()
{
    int _=1;
    //cin >>_;
    while (_--) sol();
    return 0;
}

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