Cod sursa(job #2570248)
Utilizator | Drelciuc Alex ROGrinder | Data | 4 martie 2020 15:44:23 |
---|---|---|---|
Problema | Invers modular | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.53 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream f ("inversmodular.in");
ofstream g ("inversmodular.out");
void euclid(int a , int b ,int & x ,int & y)
{
if(b == 0)
{
x = 1, y = 1;
}
else
{
int x1 , y1;
euclid(b , a % b , x1 , y1);
x = y1;
y = x1 - a / b * y1;
}
}
int main()
{
int A,N;
f>>A>>N; // prime intre ele, 1 <= A < N
int X , Y;
euclid(A, N , X ,Y);
while(X < 0)
X += N;
g << X; // 5
return 0;
}