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Cod sursa(job #109695)
#include <stdio.h>
#include <string.h>
#include <map>
using namespace std;
long long v[21], nr;
int main()
{
freopen("nkperm.in", "r", stdin);
freopen("nkperm.out", "w", stdout);
int i, n, k, t, j, a, x[21], l, used[21], cnt;
long long sol;
char c;
v[0] = 1;
for(i = 1; i <= 20; ++i)
{
v[i] = v[i - 1] * i;
}
scanf("%d %d %d ", &n, &k, &t);
if(k == 1)
{
for(i = 1; i <= t; ++i)
{
scanf(" %c ", &c);
if(c == 'A')
{
sol = 0;
for(j = 1; j <= n; ++j)
{
x[j] = j - 1;
}
for(j = 1; j <= n; ++j)
{
scanf("%d ", &a);
sol += (long long) x[a] * v[n - j];
for(l = a + 1; l <= n; ++l)
{
--x[l];
}
}
++sol;
printf("%lld\n", sol);
}
else
{
scanf("%lld ", &nr);
memset(used, 0, sizeof(used));
for(j = n; j > 0; --j)
{
l = (nr - 1) / v[j - 1] + 1;
nr -= (l - 1) * v[j - 1];
cnt = 1;
while(l)
{
if(!used[cnt])
{
--l;
}
++cnt;
}
printf("%d ", cnt - 1);
used[cnt - 1] = 1;
}
printf("\n");
}
}
}
return 0;
}