1591A - Life of a Flower - CodeForces Solution

 
 
#include<bits/stdc++.h>
using namespace std;
 
typedef long long int  ll;

#define pi(x) cout<<x;
#define ps(x) cout<<x<<" ";
#define pnl(x) cout<<x<<"\n";
#define for0(n) for(i=0;i<n;i++)
#define for1(n) for(i=1;i<=n;i++)
#define m(x) memset(x,0,sizeof x);
#define nl cout<<"\n";
#define mp make_pair
#define pb push_back
#define fr first
#define se second
#define Inf 1e16


int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
ll test,h,i,j,xy,flag=0,n,p,u,count,d,o1=0,o2=0,s,e,l,r,x,y,m,z,max1,x1,y1,k,x2,y2,z1,z2,sum,min1;
cin>>test;
while(test--){
    cin>>n;
    flag=1;
    x1=1;
    xy=0;
    for(i=0;i<n;i++){
         cin>>x;
         if(x==1){
             x1+=flag&&i?5:1;
             flag=1;
         }else{
             if(flag==0){
              xy=1;   
             }
             flag=0;
         }
    }
    if(xy){
        cout<<"-1\n";
    }else{
        cout<<x1<<"\n";
    }
}
return 0;
}