Cod sursa(job #808488)
Utilizator | Data | 6 noiembrie 2012 20:14:44 | |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.39 kb |
#include<fstream>
using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");
inline void euclid(int&x,int&y,int a,int b)
{
if(!b)
{
x=1;
y=0;
return;
}
int x0,y0;
euclid(x0,y0,b,a%b);
x=y0;
y=x0-(a/b)*y0;
}
int main()
{
int a,b,x,y;
f>>a>>b;
euclid(x,y,a,b);
if(x<=0)
x=x%b+b;
g<<x<<'\n';
f.close();
g.close();
return 0;
}