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Cod sursa(job #615205)
#include <stdio.h>
#define INPUT "permutari.in"
#define OUTPUT "permutari.out"
#define MAX 8
#define SUCCESS 0
int l;
char s[MAX + 1], m[MAX];
void perm(int p) {
if (p >= l)
printf("%s\n", s);
else {
int i;
for (i = 0; i < l; i++)
if (m[i] == 0) {
s[p] = '1' + i;
m[i] = 1;
perm(p + 1);
m[i] = 0;
}
}
}
int main() {
freopen(INPUT, "r", stdin);
freopen(OUTPUT, "w", stdout);
scanf("%d", &l);
int i;
for (i = 0; i < l; i++) {
s[i] = '1' + i;
m[i] = 0;
}
s[l] = 0;
perm(0);
fclose(stdin);
fclose(stdout);
return SUCCESS;
}