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Cod sursa(job #150333)
#include<stdio.h>
int n;
int st[10];
void afis() {
for(int i=1; i<=n; i++)
printf("%d", st[i]);
printf("\n");
}
int bun(int i, int k) {
for(int j=1; j<=k; j++)
if( st[j] == i )
return 0;
return 1;
}
void permuta(int k) {
if(k == n)
afis();
else {
for(int i=1; i<=n; i++)
if( bun(i,k) ) {
st[k+1]=i;
permuta(k+1);
}
}
}
int main() {
freopen("permutari.in", "r", stdin);
freopen("permutari.out", "w", stdout);
scanf("%d", &n);
permuta(0);
return 0;
}