delete pics to save space

p.CH1807.cpp

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+//http://contest-hunter.org:83/contest/0x18%E3%80%8C%E5%9F%BA%E6%9C%AC%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84%E3%80%8D%E7%BB%83%E4%B9%A0/1807%20Necklace
+#include<cstdio>
+#include<algorithm>
+#include<cstring>
+using namespace std;
+const int maxn=1000005;
+int n; char a[maxn*2],b[maxn*2];
+inline bool Diff(int p1,int p2)
+{
+	for(int i=0;i<n;i++) if(a[p1+i]!=b[p2+i]) return 1;
+	return 0;
+}
+inline int GetMin(char *s)
+{
+	int i=0,j=1,k;
+	while(i<n&&j<n)
+	{
+		for(k=0;k<n&&s[i+k]==s[j+k];k++);
+		if(k==n) break;
+		if(s[i+k]>s[j+k])
+		{
+			i+=k+1;
+			if(i==j) i++;
+		}
+		else
+		{
+			j+=k+1;
+			if(i==j) j++;
+		}
+	}
+	return min(i,j);
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%s%s",a,b);
+	n=strlen(a);
+	memcpy(a+n,a,n); memcpy(b+n,b,n);
+	int p1=GetMin(a),p2=GetMin(b);
+	if(Diff(p1,p2)) printf("No\n");
+	else
+	{
+		printf("Yes\n");
+		for(int i=0;i<n;i++) printf("%c",a[p1+i]); puts("");
+	}
+	return 0;
+}