mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-12-25 17:32:01 +00:00
47 lines
774 B
C++
47 lines
774 B
C++
#include <iostream>
|
|
|
|
using std::cin;
|
|
using std::cout;
|
|
const char endl = '\n';
|
|
|
|
long long x, y, n, m, l;
|
|
|
|
long long exgcd(long long a, long long b, long long &x, long long &y) {
|
|
if (!b) {
|
|
x = 1;
|
|
y = 0;
|
|
return a;
|
|
}
|
|
|
|
long long g = exgcd(b, a % b, x, y);
|
|
long long t = x;
|
|
x = y;
|
|
y = t - a / b * y;
|
|
return g;
|
|
}
|
|
|
|
int main() {
|
|
std::ios::sync_with_stdio(false);
|
|
|
|
cin >> x >> y >> m >> n >> l;
|
|
|
|
long long b = n - m,
|
|
c = x - y,
|
|
xx, yy;
|
|
|
|
if (b < 0) {
|
|
b = -b;
|
|
c = -c;
|
|
}
|
|
|
|
long long g = exgcd(b, l, xx, yy);
|
|
|
|
if (c % g) {
|
|
cout << "Impossible" << endl;
|
|
} else {
|
|
cout << (c / g * xx % (l / g) + (l / g)) % (l / g) << endl;
|
|
}
|
|
|
|
return 0;
|
|
}
|