제출 #814711

#제출 시각아이디문제언어결과실행 시간메모리
814711antonGrowing Vegetables is Fun 4 (JOI21_ho_t1)C++17
100 / 100
70 ms7084 KiB
#include<bits/stdc++.h> using namespace std; #define int long long #define pii pair<int, int> const int MAX_N = 2* 1e5; int n, A[MAX_N]; int pref[MAX_N], suf[MAX_N]; signed main(){ cin>>n; for(int i = 0; i<n; i++){ cin>>A[i]; } pref[0] = 0; for(int i = 1; i<n; i++){ pref[i] =pref[i-1]; if(A[i-1]>=A[i]){ pref[i] += A[i-1]-A[i] + 1; } } suf[n-1] = 0; for(int i = n-2; i>=0; i--){ suf[i] = suf[i+1]; if(A[i] <= A[i+1]){ suf[i] += A[i+1]-A[i]+1; } } int res = 1e18; for(int i = 0; i<n; i++){ res = min(res, max(pref[i],suf[i])); } cout<<res<<endl; }
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