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Cod sursa(job #422197)
#include <stdio.h>
#include <stdlib.h>
int n,perm,m;
int a[1001][1001];
int viz[1001];
int v[1001];
FILE *f1 = fopen("dusman.in","r");
FILE *f2 = fopen("dusman.out","w");
int cont(int k){
if(k > 1 && a[v[k]][v[k-1]])
return 0;
return 1;
}
void back(int k){
int i;
if(k == n + 1){
perm--;
if(!perm){
for(i=1; i<=n; i++)
fprintf(f2,"%d ",v[i]);
fclose(f1);
fclose(f2);
exit(0);
}
return;
}
for(i=1; i<=n; i++){
if(!viz[i]){
v[k] = i;
viz[i] = 1;
if(cont(k))
back(k+1);
viz[i] = 0;
}
}
}
int main(){
fscanf(f1,"%d%d%d",&n,&perm,&m);
int x1,x2,i;
for(i=1; i<=m; i++){
fscanf(f1,"%d%d",&x1,&x2);
a[x1][x2] = 1;
a[x2][x1] = 1;
}
back(1);
return 0;
}