Submission #646716

#	Time	Username	Problem	Language	Result	Execution time	Memory
646716		inksamurai	Krov (COCI17_krov)	C++17	70 / 140	1587 ms	2008 KiB

krov

#include <bits/stdc++.h>
using namespace std;
#define int ll
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3SJjfN1 ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e

signed main(){
_3SJjfN1;
	int n;
	cin>>n;
	vi a(n);
	rep(i,n){
		cin>>a[i];
	}
	auto af=[&](int pvt,int x)->int{
		int res=0;
		per(i,pvt+1){
			int need=x-(pvt-i);
			res+=abs(need-a[i]);
		}
		rng(i,pvt+1,n){
			int need=x-(i-pvt);
			res+=abs(need-a[i]);
		}
		return res;
	};
	const int inf=1e18;
	int ans=inf;
	rep(i,n){
		int l=max(i+1,n-i),r=1e10;
		while(r-l>3){
			int ml=(2*l+r)/3;
			int mr=(l+2*r)/3;
			int fl=af(i,ml);
			int fr=af(i,mr);
			if(fl<fr){
				r=mr;
			}else{
				l=ml;
			}
		}
		rng(j,l,r+1){
			ans=min(ans,af(i,j));
		}
	}
	print(ans);
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14