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DSA01009.cpp
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DSA01009.cpp
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#include<bits/stdc++.h>
using namespace std;
int n,k,ok,ans=0;
string s;
void in2()
{
int mx = 0;
int cnt=0;
for(int i=0;i<n;i++)
{
if(s[i]=='A')
{
cnt++;
mx = max(cnt,mx);
}
else
{
cnt=0;
}
}
if(mx==k)
{
for(int i=0;i<n;i++)
cout<<s[i];
cout<<endl;
}
}
void in()
{
int mx = 0;
int cnt=0;
for(int i=0;i<n;i++)
{
if(s[i]=='A')
{
cnt++;
mx = max(cnt,mx);
}
else
{
cnt=0;
}
}
if(mx==k)
{
ans++;
}
}
void gen()
{
int i = s.size()-1;
while(i>=0 and s[i]=='B')
{
s[i]='A';
i--;
}
if(i>=0)
s[i]='B';
else ok=0;
}
int main()
{
cin>>n>>k;
s = "";
for(int i=0;i<n;i++)
s+="A";
ok = 1;
while(ok)
{
in();
gen();
}
ok = 1;
cout<<ans<<endl;
while(ok)
{
in2();
gen();
}
}