B - Problem B CodeForces - 25A
Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given n numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — to check his answers, he needs a program that among the given n numbers finds one that is different in evenness.
Input
The first line contains integer n (3 ≤ n ≤ 100) — amount of numbers in the task. The second line contains n space-separated natural numbers, not exceeding 100. It is guaranteed, that exactly one of these numbers differs from the others in evenness.
Output
Output index of number that differs from the others in evenness. Numbers are numbered from 1 in the input order.
Examples
Input
5
2 4 7 8 10
Output
3
Input
4
1 2 1 1
Output
2
题目大意：一组数只有一个奇数或者偶数，输出它的位置
思路：建立一个数组放数字，然后对偶数/奇数进行计数，若个数为一，则记录其下标。
#include<iostream>
using namespace std;
int main()
{
int a[105];
int n, x=0, y=0, temp1, temp2;
cin >> n;
for (int i=0; i < n; i++)
{
cin >> a[i];
if (a[i] % 2 == 0)
{
x++;
if (x==1)
{
temp1 = i;
}
else
{
temp1 = -1;
}
}
else
{
y++;
if (y == 1)
{
temp2 = i;
}
else
{
temp2 = -1;
}
}
}
if (temp1>-1)
cout << temp1+1;
if (temp2>-1)
cout << temp2+1;
return 0;
}