Problem:
Score: 100 points

Problem Statement

A triple of numbers is said to be poor when two of those numbers are equal but the other number is different from those two numbers.

You will be given three integers A, B, and C. If this triple is poor, print Yes; otherwise, print No.

Constraints

A, B, and C are all integers between 1 and 9 (inclusive).

Input

Input is given from Standard Input in the following format:

A B C

Output

If the given triple is poor, print Yes; otherwise, print No.

Sample Input 1

5 7 5

Sample Output 1

Yes

A and C are equal, but B is different from those two numbers, so this triple is poor.

Sample Input 2

4 4 4

Sample Output 2

No

A, B, and C are all equal, so this triple is not poor.

Sample Input 3

4 9 6

Sample Output 3

No

Sample Input 4

3 3 4

Sample Output 4

Yes

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;

#define loop(i, n) for(int i = 0;i < int(n);i++)
#define rloop(i, n) for(int i = int(n);i >= 0;i--)
#define range(i, a, b) for(int i = int(a);i <= int(b);i++)
#define sz(c) int(c.size())
#define clr(v, d)   memset(v, d, sizeof(v))
#define ALL(c) c.begin(), c.end()
#define RALL(c) c.rbegin(), c.rend()
#define PI acos(-1)
#define pb push_back
#define mp make_pair
#define fr first
#define sc second
#define INF             INT64_MAX
#define NINF            INT64_MIN
#define ROW 1001
#define COL 1001

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef vector<ii> vii;
typedef vector<int> vi;
typedef vector<pll> vll;
typedef vector<ll> vl;


int main() {

    map<int,int> m;
    int a,b,c;
    cin>>a>>b>>c;
    m[a]++;
    m[b]++;
    m[c]++;
    if(m.size()==2)
        cout<<"YES"<<endl;
    else
        cout<<"NO"<<endl;
    return 0;
}