Cod sursa(job #1153565)
Utilizator | Nistor Sergiu NistorSergiu | Data | 25 martie 2014 16:17:12 |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.48 kb |
#include <fstream>
using namespace std;
void euclid(int a, int b, int &x, int &y)
{
if(b==0)
{
x=1;
y=0;
}
else
{
int x0,y0;
euclid(b,a%b,x0,y0);
x=y0;
y=x0-(a/b)*y0;
}
}
int main()
{
int n,a;
int x,y;
ifstream f("inversmodular.in");
f>>a>>n;
f.close();
euclid(a,n,x,y);
x%=n;
if(x<0)
x+=n;
ofstream g("inversmodular.out");
g<<x<<'\n';
g.close();
return 0;
}