delete pics to save space

2.1590.cpp

@@ -0,0 +1,45 @@
+#include<iostream>
+using namespace std;
+unsigned int ips[1005];
+int m;
+unsigned int base=0xffffffffu;
+bool check(int n)
+{
+	for(int i=1;i<m;i++)
+		if((ips[0]&(base<<n))^(ips[i]&(base<<n)))
+			return 0;
+	return 1;
+}
+inline void print(unsigned int ip)
+{
+	cout<<(ip>>24)<<"."<<((ip>>16)&0xffu)<<"."<<((ip>>8)&0xffu)<<"."<<(ip&0xffu)<<endl;
+}
+void solve()
+{
+	unsigned int t1,t2,t3,t4;
+	char t;
+	for(int i=0;i<m;i++)
+	{
+		cin>>t1>>t>>t2>>t>>t3>>t>>t4;
+		ips[i]=(t1<<24)|(t2<<16)|(t3<<8)|t4;
+//		cout<<'\t'<<ips[i]<<endl<<'\t';
+//		print(ips[i]);
+	}
+	int i;
+	for(i=0;i<=32;i++)
+		if(check(i))
+		{
+			print(ips[0]&(base<<i));
+			print(base<<i);
+			return;
+		}
+	cout<<"0.0.0.0\n0.0.0.0"<<endl;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(cin>>m) solve();
+	return 0;
+}