80pts求条

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
const int mod=1e9+7;
const int inf=1e13;
int max(int A,int B){return (A>B)?A:B;}
int min(int A,int B){return (A<B)?A:B;}
int gcd(int a,int b){return b?gcd(b,a%b):a;}
int lcm(int a,int b){return a*b/gcd(a,b);}

signed main(){
	ios::sync_with_stdio(0),
	cin.tie(0),cout.tie(0);
	int n;cin>>n;
    int a[n];
    for(int i=0;i<n;i++) cin>>a[i];
    sort(a,a+n);
    int ans=LONG_LONG_MAX,cnt=1,as=a[0];
    for(int i=1;i<n;i++){
        if(a[i]==as) continue;
        if(a[i]==as+1) as++,cnt++;
        else ans=min(cnt,ans),cnt=1,as=a[i];
    }cout<<min(cnt,ans);return 0;
}