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A.cpp
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A.cpp
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#include<bits/stdc++.h>
#include<string>
using namespace std;
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL)
int main()
{
fastio;
int t,n,i,l,r,p;
char a[100],b[100];
char x='0';
string abc;
cin>>t;
while(t--)
{
l=0;
r=0;
p=0;
x='0';
cin>>abc;
n=abc.size();
for(i=0;i<n;i++)
a[i]='0';
if(abc[0]==abc[n-1])
{
cout<<"NO\n";
continue;
}
for(i=0;i<n;i++)
{
if(abc[i]==abc[0])
{
a[i]='(';
//b[i]='(';
l++;
}
if(abc[i]==abc[n-1])
{
a[i]=')';
//b[i]=')';
r++;
}
}
for(i=0;i<n;i++)
{
if(abc[i]!=abc[0] && abc[i]!=abc[n-1])
{
if(x=='0')
{
if(l==r)
{
p=1;
break;
}
if(l<r)
{
x='(';
}
else
{
x=')';
}
//a[i]=x;
}
a[i]=x;
}
}
/*for(int j=0;j<n;j++)
cout<<a[j];
cout<<"\n";*/
l=0;
r=0;
for(i=0;i<n;i++)
{
if(r>l)
{
p=1;
break;
}
if(a[i]=='(')
l++;
else
r++;
}
if(p==1)
cout<<"NO"<<"\n";
else if(l!=r)
cout<<"NO"<<"\n";
else
cout<<"YES"<<"\n";
}
return 0;
}