Cod sursa(job #1817641)
Utilizator | Cosmin Manea cosminmanea | Data | 28 noiembrie 2016 10:51:57 |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.5 kb |
#include <cstdio>
using namespace std;
int a,n;
void euclid(int a,int b,int &x,int &y)
{
if(b==0)
{
x=1;
y=0;
}
else
{
euclid(b,a%b,x,y);
int shm=x;
x=y;
y=shm-y*(a/b);
}
}
int main()
{
FILE *f=fopen("inversmodular.in","r");
fscanf(f,"%d%d",&a,&n);
int x,y;
euclid(a,n,x,y);
while(x<1)
x+=n;
fclose(f);
f=fopen("inversmodular.out","w");
fprintf(f,"%d",x);
return 0;
}