Cod sursa(job #2606389)
Utilizator | Data | 27 aprilie 2020 17:16:53 | |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.55 kb |
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
using namespace std;
void euclid_e(int a,int b,int& x,int& y,int& d){
if(b==0) {
d=a;
x=1;
y=0;
return;
}
int xx,yy,q=a/b;
euclid_e(b,a%b,xx,yy,d);
x=yy;
y=xx-yy*q;
}
int main(){
int a,n,x,y,d;
FILE *fin,*fout;
fin=fopen("inversmodular.in","r");
fout=fopen("inversmodular.out","w");
fscanf(fin,"%d%d",&a,&n);
euclid_e(a,n,x,y,d);
x%=n;
if(x<0){
x+=n;
}
fprintf(fout,"%d",x);
fclose(fin);
fclose(fout);
return 0;
}