Submission #936906

#	Time	Username	Problem	Language	Result	Execution time	Memory
936906		emanIaicepsa	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	22 ms	5180 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define dbg(...) cerr<<#__VA_ARGS__<<" = ";_do(__VA_ARGS__);
template<typename T> void _do(T x){cerr<<x<<"\n";}
template<typename T,typename ...U> void _do(T x,U ...y){cerr<<x<<", ";_do(y...);}

signed main(){
    ios::sync_with_stdio(0), cin.tie(0);
    int N;
    cin >> N;
    vector<ll> arr(N), cost(N), costR(N);
    for (auto &i: arr) cin >> i;

    cost[0] = 0;
    for (int i = 1; i < N; i++) {
        if (arr[i] > arr[i - 1]) cost[i] = cost[i - 1];
        else cost[i] = cost[i - 1] + (arr[i - 1] - arr[i]) + 1;
    }

    costR[N - 1] = 0;
    for (int i = N - 2; i >= 0; i--) {
        if (arr[i] > arr[i + 1]) costR[i] = costR[i + 1];
        else costR[i] = costR[i + 1] + (arr[i + 1] - arr[i]) + 1;
    }

    ll answer = 1e18;
    for (int i = 0; i < N; i++) {
        answer = min(answer, max(cost[i], costR[i]));
    }
    cout << answer << '\n';


}

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