关于队里面最菜的在博客打卡第五十八天这件事

https://codeforces.com/contest/1418/problem/C

题目：

 

ac代码：

#include
#include
#include
using namespace std;
const int N = 2e5 + 10;

int f[N];
int a[N];
int main()
{
    int t;
    cin >> t;
    while(t--)
    {
        int n ;
        cin >> n ;

        for(int i = 1; i <= n ; i ++)
        {
            cin >> a[i];
        }
        a[n+1] = 0 ;
        for(int i = 0 ; i <= n+1 ; i ++)f[i] = 1e9;

        if(a[1] == 1)f[1] = 1;
        else f[1] = 0 ;

        for(int i = 2; i <= n+1 ; i ++)
        {
            f[i] = f[i-1];
            if(a[i])f[i]++;
            if(i >= 2)f[i] = min(f[i],f[i-2] + (a[i] == 1));
            if(i >= 3)f[i] = min(f[i],f[i-3] + (a[i] == 1));
            
        }
        cout <