제출 #1217359

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1217359		maomao	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	14 ms	4348 KiB

Main

#include <iostream>
using namespace std;
#define ll long long
#define fori(n) for(int i=1;i<=n;i++)
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    int n; cin >> n;
    const int m = 200005;
    int h[m];h[0]=0;
    fori(n) cin >> h[i];
    //precompute the cost so far if chose (i,n+1-i)
    ll pre[m] = {0};
    for(int i=2;i<=n;i++) pre[i] = pre[i-1] + max(0,h[i-1]-h[i]+1);
    ll suf[m] = {0};
    for(int i=n-1;i>=1;i--) suf[i] = suf[i+1] + max(0,h[i+1]-h[i]+1);
    
    ll ans = min(pre[n],suf[1]);
    fori(n-1) ans = min(ans,max(pre[i],suf[i])); //max pre[i] suf[i] to water range(i,n+1-i) and suffice both ends
    cout << ans;
    return 0;
}

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