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【TOJ 3812】Find the Lost Sock

hat align charat ima integer which abcde inpu color

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.

技術分享圖片

Alice wants to know which sock she has lost. Maybe you can help her.

輸入

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.

輸出

The name of the lost sock.

樣例輸入

2
aabcdef
bzyxwvu
bzyxwvu
4
aqwerty
eas fgh
aqwerty
easdfgh
easdfgh
aqwerty
aqwerty
2
0x0abcd
0ABCDEF
0x0abcd

樣例輸出

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; }

【TOJ 3812】Find the Lost Sock