Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a number chosen from [1]. The first one who bets on a unique number wins. For example, if there are 7 people betting on { 5 31 5 88 67 88 17 }, then the second one who bets on 31 wins.
Input Specification:
Each input file contains one test case. Each case contains a line which begins with a positive integer N (≤) and then followed by N bets. The numbers are separated by a space.
Output Specification:
For each test case, print the winning number in a line. If there is no winner, print None instead.
Sample Input 1:
7 5 31 5 88 67 88 17
Sample Output 1:
31
Sample Input 2:
5 888 666 666 888 888
Sample Output 2:
None#include <iostream>
using namespace std;
int main(){
int T;
cin>>T;
int va[T],coun[];
for(int i=;i<T;i++){
scanf("%d",&va[i]);
coun[va[i]]++;
}
bool has=false;
for(int i=;i<T;i++){
if(coun[va[i]]==) {
cout<<va[i];
has=true;
break;
}
}
if(!has) cout<<"None";
system("pause");
return ;
}