delete pics to save space

7.1961.cpp

@@ -0,0 +1,30 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+const int maxn=1000005;
+int n,kase,nxt[maxn]; char s[maxn];
+inline void build()
+{
+	nxt[1]=0;
+	for(int i=2,j=0;i<=n;i++)
+	{
+		while(j>0&&s[i]!=s[j+1]) j=nxt[j];
+		if(s[i]==s[j+1]) j++;
+		nxt[i]=j;
+	}
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d",&n)==1&&n)
+	{
+		scanf("%s",s+1);
+		build();
+		printf("Test case #%d\n",++kase);
+		for(int i=2;i<=n;i++) if(i%(i-nxt[i])==0&&i/(i-nxt[i])>1) printf("%d %d\n",i,i/(i-nxt[i]));
+		puts("");
+	}
+	return 0;
+}