delete pics to save space

history_source/ccf 基础篇/U8/8.6.3.cpp

@@ -0,0 +1,41 @@
+#include<cstdio>
+using namespace std;
+unsigned long long gcd(unsigned long long m,unsigned long long n) 
+{
+	int x=1;
+	unsigned long long t;
+    begin:if(m==n) return x*m;
+    if(m<n) 
+    {
+    	t=m,m=n,n=t;
+    	goto begin;
+	}
+    if(m&1)
+    {
+    	if(n&1) 
+    	{
+    		t=n;
+    		n=m-n;
+    		m=t;
+    		goto begin;
+		}
+		n=n>>1;
+		goto begin;
+	}
+    if(n&1)
+    {
+    	m=m>>1;
+    	goto begin;
+	}
+	x=x*2;
+	m=m>>1;
+	n=n>>1;
+	goto begin;
+}
+int main()
+{
+	unsigned long long n,m;
+	scanf("%lld%lld",&n,&m);
+	printf("%lld\n",gcd(n,m));
+	return 0;
+}