【HDU-2669 Romantic】

题目

Problem - 2669 (hdu.edu.cn)

代码

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
LL ex_gcd(LL a, LL b, LL &x, LL &y)
{if (b == 0){x = 1;y = 0;return a;}LL gcd = ex_gcd(b, a % b, x, y);LL temp;temp = x;x = y;y = temp - a / b * y;return gcd;
}
int main()
{LL a, b;while (scanf("%lld %lld", &a, &b) == 2){LL x, y;LL gcd = ex_gcd(a, b, x, y);if (gcd != 1){cout << "sorry\n";continue;}x = (x % b + b) % b;y = (1 - a * x) / b;printf("%ld %ld\n", x, y);}
}