题目描述

blablabla

样例

blablabla

题目简单

C++ 代码

#include<iostream>
#include<algorithm>
using namespace std;
const int N = 100010;
int n,a[N];

bool check(int c, int b)
{
    for(int k = b; k < c; k++)
        if(a[k] == a[c]) 
            return true;
    return false;
}

int main()
{
    cin >> n;
    for(int i = 0; i< n; i++)
        cin >> a[i];
    int res = 0;
    for(int i = 0,j = 0; i< n; i++)
    {
        while(j < i && check(i,j)) j++;

        res = max(res,i-j+1);
        //cout << res << " ";
    }
    cout << res;

    return 0;
}