delete pics to save space

history_source/挑战程序设计竞赛/2.6.1.1.cpp

@@ -0,0 +1,22 @@
+#include<cstdio>
+inline int abs(int a)
+{return a<0?-a:a;}
+inline int gcd(int a,int b)
+{return b==0?a:gcd(b,a%b);}
+int x1,x2,y1,y2;
+void solve()
+{
+	int x=abs(x1-x2),y=abs(y1-y2);
+	if(x==0&&y==0) printf("%d\n");
+	else printf("%d\n",gcd(x,y)-1);
+}
+void init()
+{
+	scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
+}
+int main()
+{
+	init();
+	solve();
+	return 0;
+}