delete pics to save space

7.1635.cpp

@@ -0,0 +1,36 @@
+#include<cstdio>
+#include<iostream>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+typedef unsigned long long ULL;
+const int maxn=10005;
+int T,n; char a[maxn],b[maxn],*p;
+ULL h[maxn];
+const ULL md=1287349021931ull;
+ULL hsh(int d)
+{
+	ULL s=h[d];
+	while(*p!=0&&*p++=='0') s=(s+hsh(d+1)*h[d])%md;
+	return s*s%md;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+//	freopen("pro.out","w",stdout);
+#endif
+	srand(131);
+	scanf("%d",&T);
+	for(int i=0;i<10000;i++) h[i]=((((ULL)rand()*(ULL)rand()+(ULL)rand())*(ULL)rand()+(ULL)rand())*(ULL)rand()+(ULL)rand())%md;
+	while(T-->0)
+	{
+		scanf("%s%s",a,b);
+		if(strlen(a)!=strlen(b)) { puts("different"); continue; }
+		p=a; ULL ha=hsh(1);
+		p=b; ULL hb=hsh(1);
+//		cout<<"ha="<<ha<<" hb="<<hb<<endl;
+		puts(ha==hb?"same":"different");
+	}
+	return 0;
+}