Cod sursa(job #2678137)
Utilizator | Data | 28 noiembrie 2020 10:46:06 | |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.46 kb |
#include <fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
int a,n,x,y;
void euclid_ext(int a,int n,int &x,int &y)
{
int x0,y0;
if(n==0)
{
x=1;
y=0;
return;
}
euclid_ext(n,a%n,x0,y0);
x=y0;
y=x0-(a/n)*y0;
}
int main()
{
fin>>a>>n;
euclid_ext(a,n,x,y);
while(x<0)
x+=n;
fout << x << endl;
return 0;
}