Pagini recente » Cod sursa (job #2056770) | Cod sursa (job #844546) | Cod sursa (job #1928764) | Cod sursa (job #1162684) | Cod sursa (job #1352314)
#include <iostream>
#include <fstream>
using namespace std;
ifstream fi("inversmodular.in");
ofstream fo("inversmodular.out");
#define LL long long
LL euler(LL n){
LL c=n;
for(LL i=2;i*i<=n;++i)
{
if(n%i==0)
{
while(n%i==0)n/=i;
c = (c/i)*(i - 1);
}
}
if(n!=1)c=c/n*(n-1);
return c;
}
int main()
{
LL n,p,j,k,a,sol=1;
fi>>a>>n;
p=euler(n)-1;
for(j=0;(1<<j)<=p;++j)
{
if(((1<<j)&p)>0)
sol=sol*a;
a=a*a;
}
fo<<sol%n<<endl;
return 0;
}