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Cod sursa(job #841663)
#include <stdio.h>
#define MOD 666013
int fact(int x)
{
int i, ans = 1;
for (i = 2; i <= x; i ++)
ans = 1LL * ans * i % MOD;
return ans;
}
int pw(int A, int B)
{
int times, ans = 1;
for (times = 1; times <= B; times ++)
ans = ans * 1LL * A;
return ans;
}
int main()
{
int K, N;
freopen("kperm.in", "r", stdin);
freopen("kperm.out", "w", stdout);
scanf("%d%d", &N, &K);
if (K % 2 == 0)
{
printf("0");
return 0;
}
int C = N / K, R = N % K;
int sol = 1LL * fact(R) * pw(fact(C + 1) % MOD, R) % MOD;
sol = (sol * 1LL * fact(K - R)) % MOD;
sol = sol * 1LL * pw(fact(C) % MOD, K - R) % MOD;
printf("%d", sol);
return 0;
}