Cod sursa(job #3162567)
Utilizator | Data | 29 octombrie 2023 13:36:46 | |
---|---|---|---|
Problema | Invers modular | Scor | 0 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.53 kb |
#include <fstream>
using namespace std;
ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");
void invmod(long long &x, long long &y, int a, int b)
{
if (!b)
x = 1, y = 0;
else
{
invmod(x, y, b, a % b);
long long f = x;
x = y;
y = f - y * (a / b);
}
}
int main()
{
long long inv = 0, ins;
int a, n;
cin >> a >> n;
invmod(inv, ins, a, m);
if (inv <= 0)
inv =n + inv % n;
cout << inv;
return 0;
}