Pagini recente » Cod sursa (job #1370333) | Cod sursa (job #2628753) | Cod sursa (job #2886398) | Cod sursa (job #661233) | Cod sursa (job #1402815)
#include <fstream>
#define ll long long
#define mod 9999991
using namespace std;
ifstream f("dirichlet.in");
ofstream g("dirichlet.out");
ll x, y, xx, yy, n, rez=1;
ll factorial(ll x)
{
if (x==1) return 1;
return (x*factorial(x-1))%mod;
}
ll euclid(ll a, ll b, ll &x, ll &y)
{
if(b==0)
{
x=1;
y=0;
return a;
}
else
{
ll x0,y0,d;
d=euclid(b,a%b,x0,y0);
x=y0;
y=x0-(a/b)*y0;
return d;
}
}
int main()
{
f>>n;
rez*=factorial(2*n);
rez%=mod;
euclid(factorial(n+1),mod,x,y);
while (x<0) x+=mod;
euclid(factorial(n),mod,xx,y);
while (xx<0) xx+=mod;
rez*=x;
rez%=mod;
rez*=xx;
rez%=mod;
g<<rez;
return 0;
}