Submission #1156174

#	Time	Username	Problem	Language	Result	Execution time	Memory
1156174		Nurislam	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	27 ms	5084 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define int long long
//#define all(x) x.begin(),x.end()
//#define rall(x) x.rbegin(),x.rend()
//#define ff first
//#define ss second
//#define pb push_back
//template<class T, class U> inline bool chmin(T& a, const U& b) { if (a > b) { a = b; return true; } return false; }
//template<class T, class U> inline bool chmax(T& a, const U& b) { if (a < b) { a = b; return true; } return false; }
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//#define rnd(l, r) uniform_int_distribution <int> (l, r)(rng)

const int inf = 1e6, mod = 1e9 + 7;

void solve(){
	int n;
	cin >> n;
	vector<int> a(n);
	for(int &i : a)cin >> i;
	
	
	vector<int> pr(n, 0);
	for(int i = 1; i < n; i ++ )pr[i] = pr[i-1] + max(0ll, a[i-1] - a[i] + 1);
	vector<int> sf(n, 0);
	for(int i = n - 2; i >= 0; i -- )sf[i] = sf[i+1] + max(0ll, a[i+1] - a[i] + 1);
	
	int ans = sf[0];
	
	for(int i = 0; i < n; i ++ ){
		ans = min(ans, max(sf[i], pr[i]));
	}
	
	cout << ans << '\n';
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);
    int tt = 1;
    //cin >> tt;
    while(tt--){
        solve();
    };
}

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