delete pics to save space

history_source/挑战程序设计竞赛/2.6.1.2.cpp

@@ -0,0 +1,30 @@
+#include<cstdio>
+int egcd(int a,int b,int &x,int &y)
+{
+	static int d;
+	d=a;
+	if(b!=0)
+	{
+		d=egcd(b,a%b,y,x);
+		y-=(a/b)*x;
+	}
+	else x=1,y=0;
+	return d;
+}
+int a,b;
+void solve()
+{
+	int x,y;
+	if(egcd(a,b,x,y)>1) printf("-1\n");
+	else printf("%d %d %d %d\n",x>=0?x:0,x<0?-x:0,y>=0?y:0,y<0?-y:0);
+}
+void init()
+{
+	scanf("%d%d",&a,&b);
+}
+int main()
+{
+	init();
+	solve();
+	return 0;
+}