delete pics to save space

2.11549.cpp

@@ -0,0 +1,36 @@
+#include<cstdio>
+int T,n,k,res,k1,k2;
+int buf[100];
+inline int next(int n,int k)
+{
+	if(!k) return 0;
+	long long k2=(long long)k*k;
+	int L=0;
+	while(k2>0) { buf[L++]=k2%10; k2/=10; }
+	if(n>L) n=L;
+	int res=0;
+	for(int i=0;i<n;i++)
+		res=res*10+buf[--L];
+	return res;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&T);
+	while(T-->0)
+	{
+		scanf("%d%d",&n,&k);
+		res=k1=k2=k;
+		do
+		{
+			k1=next(n,k1);
+			k2=next(n,k2); if(k2>res) res=k2;
+			k2=next(n,k2); if(k2>res) res=k2;
+		}
+		while(k1!=k2);
+		printf("%d\n",res);
+	}
+	return 0;
+}