Pagini recente » Istoria paginii utilizator/axismundi | Monitorul de evaluare | Istoria paginii utilizator/udrescu.cristian | Istoria paginii utilizator/cercel | Cod sursa (job #1900528)
#include <cstdio>
using namespace std;
int p(int a,int put,int mod)
{
int pow=1;
while(put)
{
if(put%2)
{
put--;
pow*=a;
pow%=mod;
}
a*=a;
a%=mod;
put/=2;
}
return pow;
}
int main()
{
freopen("inversmodular.in","r",stdin);
freopen("inversmodular.out","w",stdout);
int n,a,i,put,cn;
scanf("%d%d",&a,&n);
put=n-1;
cn=n;
for(i=2;i*i<=n;i++)
if(n%i==0)
{
put-=put/i;
while(n%i==0)
n/=i;
}
if(n>1&&put>n)
put-=put/n;
n=cn;
put--;
a%=n;
printf("%d",p(a,put,n));
return 0;
}