Cod sursa(job #3030090)
Utilizator | Radulescu Stefan stefan2806 | Data | 17 martie 2023 15:14:19 |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.58 kb |
#include <fstream>
using namespace std;
ifstream cin("inversmodular.in");
ofstream cout("inversmodular.out");
long long a,n,b,x,y,d;
int euclid(int a,int b,long long &x,long long &y)
{
long long d,x0,y0;
if(b==0)
{
x=1;
y=0;
return a;
}
else
{
d=euclid(b,a%b,x0,y0);
x=y0;
y=x0-(a/b)*y0;
return d;
}
}
int main()
{
cin>>a>>n;
b=n;
d=euclid(a,b,x,y);
if(d==1)
{
while(x<0)
x+=n;
cout << x << endl;
}
return 0;
}