cf1234E

 

 

比较常见的题型，应该递推求解

#include<bits/stdc++.h>
#define forn(i, n) for (int i = 0 ; i < int(n) ; i++)
#define fore(i, s, t) for (int i = s ; i < (int)t ; i++)
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define pf2(x,y) printf("%d %d\n",x,y)
#define pf(x) printf("%d\n",x)
#define each(x) for(auto it:x)  cout<<it<<endl;
#define pii pair<int,int>
using namespace std;
typedef long long ll;
const int maxn=2e6+5;
const int maxm=2e5+5;
const int inf=1e9;
int n,m,a[maxn];
ll ans;
vector<int> g[maxn];
int main(){
	cin>>n>>m;
	for(int i=0;i<m;i++){
		cin>>a[i];
		if(i) ans+=abs(a[i]-a[i-1]);
	}
	for(int i=1;i<m;i++){
		g[a[i]].push_back(a[i-1]);
		g[a[i-1]].push_back(a[i]);
	}
	cout<<ans<<' ';
	for(int i=2;i<=n;i++){
		for(auto x:g[i]) {
			if(x!=i-1 && x!=i) {
				if(x<i) ans-=i-x-1,ans+=x;
				else ans-=x-i,ans+=x-1;
			}
		}
		for(auto x:g[i-1]) {
			if(x!=i && x!=i-1) {
				if(x<i) ans-=x,ans+=i-x-1;
				else ans-=x-1,ans+=x-i;
			}
		}
		cout<<ans<<' ';
	}
	cout<<endl;
}