Cod sursa(job #2796650)
Utilizator | Vasile Andrei Calin Vasile_Andrei | Data | 8 noiembrie 2021 16:50:39 |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.58 kb |
#include <fstream>
using namespace std;
void euclid(int a, int b, int* d, int* x, int* y) {
if (b==0) {
*d=a;
*x=1;
*y=0;
}
else {
int x0, y0;
euclid(b, a%b, d, &x0, &y0);
*x = y0;
*y = x0 - (a/b)*y0;
}
}
int main()
{
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
int A,N;
fin>>A>>N;
int d,x,y;
euclid(A, N, &d, &x, &y);
while(x<0) {
x+=N;
}
fout<<x;
fin.close();
fout.close();
return 0;
}