#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,e,n,k,t,p[(1<<19)],pi,cnt;
string ss;
string s;
bool bo[(1<<19)];
string totwo(int q){
string s;
while(q>0){
if(q%2==0) s.push_back('0'); else s.push_back('1');
q/=2;
}
while(s.size()<n) s.push_back('0');
for(int h=0; h<s.size()/2; h++) swap(s[h],s[s.size()-h-1]);
return s;
}
void dfsk(int q){
pi++;
p[pi]=q;
bo[q]=1;
if(pi==(1<<n)){
cout<<(1<<n)<<endl;
for(int h=1; h<=pi; h++) cout<<totwo(p[h])<<endl;
exit(0);
}
for(int h=0; h<=(1<<n)-1; h++){
if(bo[h]==0&&__builtin_popcount((p[pi]^h))==k){
if(pi==(1<<n)-1&&__builtin_popcount((p[1]^h))!=k&&t==1) continue;
dfsk(h);
}
}
bo[q]=0;
pi--;
cnt++;
if(cnt>=40){
cout<<-1;
return 0;
}
}
int main(){
ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
cin>>n>>k>>t;
cin>>ss;
int hj=0;
for(int h=0; h<n; h++){
if(ss[h]=='1') hj+=(1<<h);
}
dfsk(hj);
return 0;
}
Compilation message
lyuboyn.cpp: In function 'std::__cxx11::string totwo(int)':
lyuboyn.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while(s.size()<n) s.push_back('0');
~~~~~~~~^~
lyuboyn.cpp:14:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int h=0; h<s.size()/2; h++) swap(s[h],s[s.size()-h-1]);
~^~~~~~~~~~~
lyuboyn.cpp: In function 'void dfsk(int)':
lyuboyn.cpp:37:13: error: return-statement with a value, in function returning 'void' [-fpermissive]
return 0;
^
