제출 #387150

#제출 시각아이디문제언어결과실행 시간메모리
387150uacoder123Growing Vegetables is Fun 4 (JOI21_ho_t1)C++14
100 / 100
30 ms7168 KiB
#include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> using namespace std; using namespace __gnu_pbds; #define F first #define S second #define FOR(i,a,b) for (auto i = (a); i <= (b); ++i) #define NFOR(i,a,b) for(auto i = (a); i >= (b); --i) #define all(x) (x).begin(), (x).end() #define sz(x) lli(x.size()) #define mp(i,a) make_pair(i,a) #define pb(a) push_back(a) #define bit(x,b) (x&(1LL<<b)) typedef long long int lli; typedef pair <lli,lli> ii; typedef pair <ii,lli> iii; typedef vector <lli> vi; typedef tree<lli,null_type,less<lli>,rb_tree_tag,tree_order_statistics_node_update> ordered_set; int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); lli n; cin>>n; lli a[n],b[n]={},e[n]={}; for(lli i=0;i<n;++i) { cin>>a[i]; if(i==0) b[0]=0; else b[i]=max(a[i-1]+1-a[i],0*1LL)+b[i-1]; } for(lli i=n-2;i>=0;--i) e[i]=e[i+1]+max(0*1LL,a[i+1]+1-a[i]); lli ans=e[0]+b[0]; for(lli i=0;i<n;++i) ans=min(ans,max(b[i],e[i])); cout<<ans<<endl; return 0; }
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