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: Accepted)

#include <bits/stdc++.h>
 
using namespace std;    
  
#define IOS ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb push_back
#define rev reverse
#define mp make_pair
#define all(x) x.begin(), x.end()
#define ll long long
#define ull unsigned long long
#define sz(x) (int)x.size()
/*
string lower(string a) {
    for(int i=0;i<a.size();i++) {
        a[i]=tolower(a[i]);
    }
    return a;
}
ll nod(ll a,ll b) {
    if(a==0)
        return b;
    else if(b==0)
        return a;
    if(a>=b)
        return nod(a%b,b);
    else if(a<=b)
        return nod(a,b%a);
}
ll nok(ll x, ll y) {
    return x/nod(x,y)*y;
} 
*/
const ll INF = 1e9+7;
int main() {
//  freopen("measurement.in", "r", stdin);
//  freopen("measurement.out", "w", stdout);
    IOS	
    set<ll> st;
    ll a, b, c;
    cin >> a >> b >> c;
    st.insert(a);
    st.insert(b);
    st.insert(c);
    if(st.size() == 2) {
    	cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
	return 0;
}