coderforce 586A Alena's Schedule

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
const int maxm=1e2+10;
int a[maxm];
int main()
{
int n;
while(scanf("%d",&n)!=EOF)
{
a[0]=0;
a[n+1]=0;
int cnt=0;
for(int i=1;i<=n;i++)
{
scanf("%d",&a[i]);
}
for(int i=1;i<=n;i++)
{
if((a[i-1]&&a[i+1])||(a[i]))
{
cnt++;
}
}
printf("%d\n",cnt);
}
return 0;
}