HDU 1563 Find your present! 找出不同的数 异或
2014-12-24 22:02
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Find your present!
Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2891 Accepted Submission(s): 1917
Problem Description
In the new year party, everybody will get a "special present".Now it's your turn to get your special present, a lot of presents now putting on the desk, and only one of them will be yours.Each present has a card number on it, and
your present's card number will be the one that different from all the others.For example, there are 5 present, and their card numbers are 1, 2, 3, 2, 1.so your present will be the one with the card number of 3, because 3 is the number that different from
all the others.
Input
The input file will consist of several cases.
Each case will be presented by an integer n (1<=n<=200, and n is odd) at first. Following that, n positive integers will be given in a line. These numbers indicate the card numbers of the presents.n = 0 ends the input.
Output
For each case, output an integer in a line, which is the card number of your present.
Sample Input
5 1 1 3 2 2 3 1 2 1 0
Sample Output
3 2
/* HDU 1563 找出不同的数 题目好像没说 其他的数出现偶数次 但是这里直接可以异或处理, */ #include<iostream> #include<stdio.h> using namespace std; int main() { int i,n,a,ans; while(scanf("%d",&n),n) { ans=0; for(i=0;i<n;i++) { scanf("%d",&a); ans=ans^a; } printf("%d\n",ans); } return 0; }
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