HDU 4810 Wall Painting（异或数学）

思路：异或的题一般要拆成二进制来看，对于每一位来说有奇数个1的时候才会是1，然后对于每一位算一个组合累加起来就可以了

#include<bits/stdc++.h>using namespace std;const int mod = 1e6+3;const int maxn = 1005;int a[maxn],ans[maxn],C[maxn][maxn];int n;#define LL long longvoid init(){C[0][0]=C[1][0]=C[1][1]=1;for(int i = 2;i<maxn;i++){C[i][0]=1;for(int j = 1;j<=i;j++)C[i][j]=(C[i-1][j]+C[i-1][j-1])%mod;}}void getone(int x){for(int i = 0;i<32;i++)if(x&(1<<i))a[i]++;}int main(){init();    while(scanf("%d",&n)!=EOF){memset(a,0,sizeof(a));memset(ans,0,sizeof(ans));for(int i =1 ;i<=n;i++){int temp;scanf("%d",&temp);getone(temp);}for(int i = 1;i<=n;i++){for(int j = 0;j<32;j++){for(int k = 1;k<=a[j]&&k<=i;k+=2)ans[i]=(ans[i]+(LL)C[n-a[j]][i-k]*C[a[j]][k]%mod*((1<<j)%mod)%mod)%mod;}}        for (int i = 1; i <= n; i++)             printf("%d%c", ans[i], i == n ? '\n' : ' ');}}

Description

Ms.Fang loves painting very much. She paints GFW(Great Funny Wall) every day. Every day before painting, she produces a wonderful color of pigments by mixing water and some bags of pigments. On the K-th day, she will select K specific bags of pigments and mix them to get a color of pigments which she will use that day. When she mixes a bag of pigments with color A and a bag of pigments with color B, she will get pigments with color A xor B. 
When she mixes two bags of pigments with the same color, she will get color zero for some strange reasons. Now, her husband Mr.Fang has no idea about which K bags of pigments Ms.Fang will select on the K-th day. He wonders the sum of the colors Ms.Fang will get with  different plans. 

For example, assume n = 3, K = 2 and three bags of pigments with color 2, 1, 2. She can get color 3, 3, 0 with 3 different plans. In this instance, the answer Mr.Fang wants to get on the second day is 3 + 3 + 0 = 6. 
Mr.Fang is so busy that he doesn’t want to spend too much time on it. Can you help him? 
You should tell Mr.Fang the answer from the first day to the n-th day.

Input

There are several test cases, please process till EOF. 
For each test case, the first line contains a single integer N(1 <= N <= 10 ³).The second line contains N integers. The i-th integer represents the color of the pigments in the i-th bag.

Output

For each test case, output N integers in a line representing the answers(mod 10 ⁶ +3) from the first day to the n-th day.

Sample Input

41 2 10 1

Sample Output

14 36 30 8