Submission #396099

#	Time	Username	Problem	Language	Result	Execution time	Memory
396099		Knps4422	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	105 ms	3808 KiB

Main

//#pragma optimization_level 3
//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include<bits/stdc++.h>
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>ordset;
*/
#define fr first
#define sc second
#define vec vector
#define pb push_back
#define pii pair<int, int>
#define forn(x,y) for(int x = 1 ; x <= (int)y ; ++x)
#define all(x) (x).begin(),(x).end()
#define fast cin.tie(0);cout.tie(0);cin.sync_with_stdio(0);cout.sync_with_stdio(0);
 
using namespace std;
 
typedef long long ll;
typedef unsigned int uint;
typedef pair<ll,ll> pll;
typedef complex<int> point;
const int nmax = 400005;
const ll linf = 1e18;
const ll mod = 998244353;
const int inf = 1e9;
const int sq = 5000;

int n, k;
int a[nmax],b[nmax];

int main(){
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
	}
	for(int i = 1; i < n; i++){
		b[i] = a[i+1] - a[i];
	}
	// b[i] > 0 , b[i] < 0
	ll cnt1(0), cnt2(0);
	for(int i = 1; i < n; i++){
		cnt2 += max(0,b[i]+1);
	}
	ll rs = max(cnt1,cnt2);
	for(int k = 1; k < n; k++){
		cnt1 += max(0,1-b[k]);
		cnt2 -= max(0,b[k]+1);
		//cout << k << ' ' << cnt1 << ' ' << cnt2 << '\n';
		rs = min(rs, max(cnt1,cnt2));
	}
	cout << rs << '\n';

}

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