Submission #682057

#	Time	Username	Problem	Language	Result	Execution time	Memory
682057		vicious	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	26 ms	6164 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define si second
typedef pair<int,int> pi;
typedef tuple<int,int,int> ti;  
template<typename T> bool chmin(T &a, T b){return (b < a) ? a = b, 1 : 0;}
template<typename T> bool chmax(T &a, T b){return (b > a) ? a = b, 1 : 0;}
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head _H, Tail... _T) {cerr<<" "<<to_string(_H);debug_out(_T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)
const int N = 200010;
const ll INF=1e18;
int n,arr[N];
ll dpf[N], dpb[N], ans=INF;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin.exceptions(ios::badbit|ios::failbit);
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> arr[i];
        if (i==1) dpf[i]=0;
        else {
            if (arr[i]>arr[i-1]) dpf[i]=dpf[i-1];
            else dpf[i] = dpf[i-1]+(arr[i-1]-arr[i])+1;
        }
    }   
    for (int i = n; i >= 1; --i) {
        if (i==n) dpb[i]=0;
        else {
            if (arr[i]>arr[i+1]) dpb[i]=dpb[i+1];
            else dpb[i] = dpb[i+1]+(arr[i+1]-arr[i])+1;
        }
    }
    for (int i = 1; i <= n; ++i) {
        chmin(ans, max(dpf[i],dpb[i]));
    }
    cout << ans;
    return 0;
}

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