uva 10673 exgcd

#include<cstdio>#include<cstring>#include<cmath>using namespace std;int  exgcd(int a,int b,int &x,int &y){int d=1;if(b==0){x=1;y=0;return a;}else{d=exgcd(b,a%b,y,x);y-=(a/b)*x;}return d;}int main(){int T,n,k;scanf("%d",&T);while(T--){scanf("%d%d",&n,&k);int a=floor(1.0*n/k),b=ceil(1.0*n/k),x,y;int d=exgcd(a,b,x,y);//printf("%d %d %d %d %d\n",d,a,b,x,y);printf("%d %d\n",x*n/d,y*n/d);}}