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Cod sursa(job #116765)
#include <cstdio>
const int maxn = 1001;
FILE *in = fopen("dusman.in","r"), *out = fopen("dusman.out","w");
int n, k, m;
int st[maxn];
int viz[maxn];
int a[maxn][maxn];
void read()
{
fscanf(in, "%d %d %d", &n, &k, &m);
int x, y;
for ( int i = 1; i <= m; ++i )
fscanf(in, "%d %d", &x, &y), a[x][y] = a[y][x] = 1;
}
void go(int i)
{
if ( k < 0 )
return;
if ( i > n )
{
--k;
if ( k == 0 )
for ( int j = 1; j <= n; ++j )
fprintf(out, "%d ", st[j]);
return;
}
for ( int j = 1; j <= n; ++j )
if ( !viz[j] && !a[ st[i-1] ][ j ] )
{
viz[j] = 1;
st[i] = j;
go(i+1);
viz[j] = 0;
}
}
int main()
{
read();
go(1);
return 0;
}