POJ 3349

Time Limit: 4000MS		Memory Limit: 65536K
Total Submissions: 38027		Accepted: 9963

Description

You may have heard that no two snowflakes(雪花) are alike. Your task is to write a program to determine whether this is really true. Your program will read information about a collection of snowflakes, and search for a pair that may be identical(同一的). Each snowflake has six arms. For each snowflake, your program will be provided with a measurement(测量) of the length of each of the six arms. Any pair of snowflakes which have the same lengths of corresponding arms should be flagged by your program as possibly identical.

Input

The first line of input(投入) will contain a single integer(整数) n, 0 < n ≤ 100000, the number of snowflakes to follow. This will be followed by n lines, each describing a snowflake(雪花). Each snowflake will be described by a line containing six integers(整数) (each integer is at least 0 and less than 10000000), the lengths of the arms of the snow ake. The lengths of the arms will be given in order around the snowflake (either clockwise(顺时针方向的) or counterclockwise(反时针方向的)), but they may begin with any of the six arms. For example, the same snowflake could be described as 1 2 3 4 5 6 or 4 3 2 1 6 5.

Output

If all of the snowflakes are distinct(明显的), your program should print the message:
No two snowflakes are alike.
If there is a pair of possibly identical(同一的) snow akes, your program should print the message:
Twin snowflakes found.

Sample Input

2
1 2 3 4 5 6
4 3 2 1 6 5

Sample Output

Twin snowflakes found.

#include
#include
#include
#include
#include
#define inf 1200007

using namespace std;

struct node
{
    int arm[7];
    int next;
}a[1200011];

int hs[1200011];
int ans=0;
int t[8];

bool jz(int sum)
{
    bool flag=true;
    int en=sum;
    while(sum!=-1)
    {
        for(int j=0;j<6;j++)
        {
            flag=true;
            for(int k=0;k<6;k++)
            {
         //   cout<>n;
    while(n--)
    {
        unsigned  sum=0;
        for(int i=0;i<6;i++)
        {
            scanf("%d",&t[i]);
            sum+=t[i];
        }
        if(flag) continue;
        unsigned ss=sum%inf;
        if(hs[ss]==-1) push(ss);
        else if(jz(hs[ss])) flag=1;
        else  push(ss);
    }
    if(flag) cout<<"Twin snowflakes found."<