39 lines
698 B
C++
39 lines
698 B
C++
|
#include <bits/stdc++.h>
|
||
|
|
using namespace std;
|
||
|
|
#define ll long long
|
||
|
|
#define endl '\n'
|
||
|
|
#define FAST (ios_base::sync_with_stdio(false), cin.tie(nullptr));
|
||
|
|
ll pow(ll x,ll y,ll m=1e9+7){ll ans=1;x%=m;while(y){if(y&1)ans=(ans*x)%m;x=(x*x)%m;y>>=1;}return ans;}
|
||
|
|
|
||
|
|
void solve()
|
||
|
|
{
|
||
|
|
ll n;
|
||
|
|
string s;
|
||
|
|
cin>>n>>s;
|
||
|
|
if(n%3==2)
|
||
|
|
{
|
||
|
|
cout<<"NO\n";
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
for(int i=2; i<s.size(); i+=3)
|
||
|
|
{
|
||
|
|
if(s[i]!=s[i-1])
|
||
|
|
{
|
||
|
|
cout<<"NO\n";
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
cout<<"YES\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
signed main()
|
||
|
|
{
|
||
|
|
FAST;
|
||
|
|
int TCS = 1;
|
||
|
|
cin >> TCS;
|
||
|
|
for (int TC = 1; TC <= TCS; ++TC)
|
||
|
|
{
|
||
|
|
// cout<<"Case "<<TC<<": ";
|
||
|
|
solve();
|
||
|
|
}
|
||
|
|
}
|