Submission #546034

#	Time	Username	Problem	Language	Result	Execution time	Memory
546034		tmn2005	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	0 / 100	1 ms	340 KiB

Main

#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#include<bits/stdc++.h>

using namespace __gnu_pbds;
using namespace std;
typedef long long ll;

#define fr first
#define sc second

#define mk make_pair
#define pb push_back
#define pob pop_back
#define pf push_front
#define pof pop_front

#define int long long
#define pii pair<int,int>
#define piii pair<int,pii>

#define all(s) s.begin(), s.end()
#define allr(s) s.rbegin(), s.rend()

#define NeedForSpeed ios::sync_with_stdio(0), cin.tie(0)
#define ordered_set tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
const int N = 2e5 + 12;
int n, m, k, a[N], b[N], c, d, pref[N], suff[N];

void solve(){
	cin>>n;
	for(int i=1; i<=n; i++){
		cin>>a[i];
		b[i] = a[i];
	}
	for(int i=1; i<=n; i++){
		if(a[i] > a[i-1])continue;
		if(a[i-1] == a[i]){
			if(pref[i-1] == pref[i]){
				a[i]++;
				pref[i]++;
			}
			else
				pref[i] = pref[i-1];
		}
		else{
			int tmp = a[i-1] - a[i] + 1;
			pref[i] = tmp;
			a[i] += tmp;
		}
	}
	for(int i=1; i<=n; i++)a[i] = b[i];
	for(int i=n; i>=1; i--){
		if(a[i] > a[i+1])continue;
		if(a[i] == a[i+1]){
			if(suff[i] == suff[i+1]){
				a[i]++;
				suff[i]++;
			}
			else
				suff[i] = suff[i+1];
		}
		else{
			int tmp = a[i+1] - a[i] + 1;
			suff[i] = tmp;
			a[i] += tmp;
		}
	}
		
	int res = 1e18;
	for(int i=0; i<=n; i++){
		res= min(res, pref[i] + suff[i+1] + (b[i] == b[i+1] ? 1 : 0));
	}
	cout<<res<<endl;
}
main(){
	NeedForSpeed;
	int T = 1;
//	cin >> T;
	while(T--){
		solve();
	}
	return 0;
}

Compilation message (stderr)

Main.cpp:76:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   76 | main(){
      | ^~~~

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60