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Cod sursa(job #524186)
#include<fstream.h>
ifstream f("dusman.in");
ofstream g("dusman.out");
int m,n,c,x,ok,s[1001],a,b,v[1001];
//i,ok,mod,aux,caut,moda,auxa,pi,auxb;
char d[1001][1001];
void afis()
{
int i;
for(i=1;i<=n;i++) g<<s[i]<<' ';
g<<'\n';
}
int valid(int y)
{
if(v[s[y]]==1) return 0;
if(d[s[y]][s[y-1]]=='1') return 0;
return 1;
}
void back(int k)
{
int i;
for(i=1;i<=n&&!ok;i++)
{s[k]=i;
//g<<i<<' '<<k<<'\n';
//afis();
if(valid(k))
{v[i]=1;
if(k==n)
{c++;
if(c==x)
{afis();
ok=1;
}
}
else back(k+1);
v[i]=0;
}
}
}
int main()
{
int i;
f>>n>>x>>m;
for(i=1;i<=m;i++)
{f>>a>>b;
d[a][b]=d[b][a]='1';}
/*i=1; auxa=1;auxb=1002; //g<<k<<'\n';
while(k>0)
{caut=auxa; ok=0;
while(s[i]==0&&caut<=n)
if(v[caut]==0&&d[caut][s[i-1]]!='1') {ok=1; v[caut]=1;s[i]=caut;}
else caut++;
if(ok==0||auxb<s[i]) if(v[auxb]==0&&d[auxb][s[i-1]]!='1') {ok=1; v[auxb]=1;s[i]=auxb;}
auxb=1002;
if(moda==1) {moda=0;v[auxa]=0; auxb=auxa; auxa=1;}
if(ok==0) {i--; auxa=s[i]; moda=1; s[i]=0;}
else i++;
if(mod==1) {mod=0; v[aux]=0;}
if(i==n+1) {k--; if(k>0) {i=n-1; v[s[n]]=0; aux=s[n-1]; mod=1; s[n-1]=s[n]=0;}}
//cout<<"bucla\n";g<<k<<'\n'; for(pi=1;pi<=n;pi++) g<<s[pi]<<' ';
//g<<'\n';
}*/
for(i=1;i<=n;i++) d[i][i]='1';
back(1);
f.close(); g.close();
return 0;
}