扩展欧几里得(求不定方程)
#include<bits/stdc++.h>
using namespace std;
int x,y,a,b;
inline int exgcd(int a,int b,int &x,int &y)
{
if(b==0)
{
x=1,y=0;
return a;
}
int temp=exgcd(b,a%b,x,y);
int t=x;
x=y;
y=t-a/b*y;
return temp;
}
int main()
{
cin>>a>>b;
int ans=exgcd(a,b,x,y);
cout<<"x="<<x<<" y="<<y;
}