제출 #770366

#제출 시각아이디문제언어결과실행 시간메모리
770366Gabi88Growing Vegetables is Fun 4 (JOI21_ho_t1)C++14
0 / 100
1 ms212 KiB
#include<bits/stdc++.h>
using namespace std;

#define LL long long

LL n, l[200009], poc = 0, kraj, sum = 0;

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0); cin >> n; kraj = n+1;
	for(int i=1; i<=n; i++) cin >> l[i];
	l[0] = 0; l[kraj] = 0;
	while(poc <= kraj){
		while(l[poc] < l[poc+1]) poc++;
		while(l[kraj] < l[kraj-1]) kraj--;
		if (poc >= kraj) break;
		sum += max(l[poc]-l[poc+1]+1, l[kraj-1]-l[kraj]+1); poc++; kraj--;
	}
	cout << sum; return 0;
}
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