Cod sursa(job #2290530)
Utilizator | Axinte Teodor TeodorAxinte | Data | 26 noiembrie 2018 17:15:51 |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.45 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
typedef long long Int;
Int n,a,x,y,d;
void cmmdc(Int,Int,Int&,Int&);
int main()
{
fin>>a>>n;
Int x,y;
cmmdc(a,n,x,y);
x%=n;
if(x<0)x+=n;
fout<<x;
return 0;
}
void cmmdc(Int a,Int b,Int &x,Int &y)
{
if(b==0){x=1;y=0;return;}
Int X,Y;
cmmdc(b,a%b,X,Y);
x=Y;
y=X-a/b*Y;
}