38 lines
731 B
C++
38 lines
731 B
C++
#include <iostream>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <string>
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#include <algorithm>
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#include <fstream>
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#include <set>
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#include <map>
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#include <queue>
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#include <stack>
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#include <list>
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#include <vector>
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#include <cmath>
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#include <iomanip>
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typedef long long LL;
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typedef unsigned long long LLU;
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const double PI=acos(-1.0);
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using namespace std;
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int main()
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{
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int t;
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cin>>t;
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while(t--)
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{
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int n, a[1111], cnt=0;
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cin>>n;
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for(int i=0; i<n; i++)
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cin>>a[i];
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for(int i=0; i<n-1 && a[i]==1; i++)
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cnt++;
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if(cnt&1)
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cout<<"No"<<endl;
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else cout<<"Yes"<<endl;
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}
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return 0;
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}
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