TOJ 3812Find the Lost Sock
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描述
Alice bought a lot of pairs of socks yesterday. But when she went home, she found that she has lost one of them. Each sock has a name which contains exactly 7 charaters.
Alice wants to know which sock she has lost. Maybe you can help her.
输入
There are multiple cases. The first line containing an integer n (1 <= n <= 1000000) indicates that Alice bought n pairs of socks. For the following 2*n-1 lines, each line is a string with 7 charaters indicating the name of the socks that Alice took back.
输出
The name of the lost sock.
样例输入
2
aabcdef
bzyxwvu
bzyxwvu
4
aqwerty
eas fgh
aqwerty
easdfgh
easdfgh
aqwerty
aqwerty
2
0x0abcd
0ABCDEF
0x0abcd
样例输出
aabcdef
eas fgh
0ABCDEF
提示
Because of HUGE input, scanf is recommended.
#include<bits/stdc++.h> using namespace std; char a[8],x[8],ch; int main() { int i,j,n; while(scanf("%d",&n)!=EOF) { memset(a,0,sizeof(a)); getchar(); for(i=1;i<=2*n-1;i++) { for(j=0;j<7;j++) { ch=getchar(); x[j]=ch; a[j]^=x[j]; } getchar(); } a[7]=‘\0‘; printf("%s\n",a); } return 0; }
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