POJ 2105

IP Address Time Limit: 1000MS Memory Limit: 30000KTotal Submissions: 13839 Accepted: 7910

Description

Suppose you are reading byte streams from any device, representing IP addresses. Your task is to convert a 32 characters long sequence of '1s' and '0s' (bits) to a dotted decimal format. A dotted decimal format for an IP address is form by grouping 8 bits at a time and converting the binary representation to decimal representation. Any 8 bits is a valid part of an IP address. To convert binary numbers to decimal numbers remember that both are positional numerical systems, where the first 8 positions of the binary systems are: 2⁷ 2⁶ 2⁵ 2⁴ 2³ 2² 2¹ 2⁰ 128 64 32 16 8 4 2 1

Input

The input will have a number N (1<=N<=9) in its first line representing the number of streams to convert. N lines will follow.

Output

The output must have N lines with a doted decimal IP address. A dotted decimal IP address is formed by grouping 8 bit at the time and converting the binary representation to decimal representation.

Sample Input

4 00000000000000000000000000000000 00000011100000001111111111111111 11001011100001001110010110000000 01010000000100000000000000000001

Sample Output

0.0.0.0 3.128.255.255 203.132.229.128 80.16.0.1

Source

México and Central America 2004

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每八位处理一下就好 /*#define LOCAL*/ #include "stdio.h" #include"string.h" int main() { #ifdef LOCAL freopen("in.txt","r",stdin); freopen("out.txt","w",stdout); #endif int t; scanf("%d",&t); while(t--) { int ip[4]; char a[32]; scanf("%s",a); memset(ip,0,sizeof(ip)); int i,k; for(i = 0; i <= 3; i++) { int j = (i + 1)*8 - 1; int chengji = 1; for(k = j; k > j - 8; k--) { ip[i] += (a[k] == '0'?0:chengji); chengji *= 2; } } printf("%d.%d.%d.%d/n",ip[0],ip[1],ip[2],ip[3]); } return 0; }