Submission #532478

#	Time	Username	Problem	Language	Result	Execution time	Memory
532478		chenyan	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	23 ms	3440 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb emplace_back
#define N 200010
int a[N],d[N],su,s,ans=1e18;
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n,i,j;
	cin>>n;
	for(i=0;i<n;i++) cin>>a[i];
	for(i=1;i<n;i++){
		d[i]=a[i]-a[i-1];
		if(d[i]>=0) su+=d[i]+1;
	}
	ans=max(su,s);
	for(i=1;i<n;i++){
		if(d[i]>=0) su-=d[i]+1;
		if(d[i]<=0) s+=-d[i]+1;
		ans=min(ans,max(su,s));
	}
	cout<<ans<<'\n';
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:14:10: warning: unused variable 'j' [-Wunused-variable]
   14 |  int n,i,j;
      |          ^

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