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 pb push_back
#define st first
#define nd second

typedef long long ll;
typedef double db;
typedef long double ldb;
typedef complex<db> cd;

typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<db, db> pdd;
typedef pair<ldb, ldb> pldb;
typedef pair<int, ll> pil;
typedef pair<ll, int> pli;

typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<db> vd;
typedef vector<ldb> vldb;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<pdd> vpd;
typedef vector<pldb> vpldb;
typedef vector<pil> vpil;
typedef vector<pli> vpli;

int si();
ll sl();
string ss(int);
char sc();
float sf();
db sd();
ldb sld();

template<typename T> void print(T, char='\n');
template<typename T, typename... Args> void print(T, Args...);

void pi(const int&, char='\n');
void pl(const ll&, char='\n');
void pf(const float&, char='\n');
void pc(const char&, char='\n');
void pd(const db&, char='\n');
void pld(const ldb&, char='\n');
void ps(const string&, char='\n');
template<typename T> void pv(const vector<T>& v, char=' ', char='\n');
template<typename It> void out(It begin, It end, char=' ', char='\n');

ll russian(ll, ll, ll);
ll fastpow(ll, ll, ll);
ll slowpow(ll, ll, ll);
ll _gcd(ll, ll);
ll _lcm(ll, ll);
ll extgcd(ll, ll, ll&, ll&);
ll _inv(ll, ll);

const int INF = 1e9;
const ll LINF = 1e18;

bool good(int a, int b, int c)
{
	return (a == b && a != c) || (a == c && a != b) || (b == c && b != a);
}

int main()
{		
	int a = si(), b = si(), c = si();
	if (good(a, b, c))
		ps("Yes");
	else
		ps("No");

	return 0;
}

template<typename T>
T scanf_t(string&& token)
{
	T a;
	scanf(token.c_str(), &a);
	return a;
}

int si() { return scanf_t<int>("%d"); }
ll sl() { return scanf_t<ll>("%lld"); }
string ss(int n) { char T[n + 7]; scanf("%s", T); return string(T); }
char sc() { return scanf_t<char>(" %c"); }
float sf() { return scanf_t<float>("%f"); }
db sd() { return scanf_t<db>("%lf"); }
ldb sld() { return scanf_t<ldb>("%Lf"); }

template<typename T>
void print(T a, char sep)
{
	string token;
	if (is_same<T, int>::value)
		token = "%d";
	else if (is_same<T, ll>::value)
		token = "%lld";
	else if (is_same<T, string>::value)
		token = "%s";
	else if (is_same<T, char>::value)
		token = "%c";
	else if (is_same<T, float>::value)
		token = "%.6f";
	else if (is_same<T, db>::value)
		token = "%.8lf";
	else if (is_same<T, ldb>::value)
		token = "%.10Lf";
	token.push_back(sep);

	printf(token.c_str(), a);
}

template<typename T, typename... Args>
void print(T first, Args... rest)
{
	print(first, ' ');
	print(rest...);
}

void pi(const int& a, char sep) { printf("%d%c", a, sep); }
void pl(const ll& a, char sep) { printf("%lld%c", a, sep); }
void pf(const float& a, char sep) { printf("%.6f%c", a, sep); }
void pc(const char& a, char sep) { printf("%c%c", a, sep); }
void pd(const db& a, char sep) { printf("%.8lf%c", a, sep); }
void pld(const ldb& a, char sep) { printf("%.10Lf%c", a, sep); }
void ps(const string& a, char sep) { printf("%s%c", a.c_str(), sep); }

template<typename It>
void out(It begin, It end, char sep, char endl)
{
	while (begin + 1 != end)
		print(*begin, sep),
		++begin;

	if (begin != end)
		print(*begin, ' '),
		printf("%c", endl);
}

template<typename T>
void pv(const vector<T>& v, char sep, char endl) { out(v.begin(), v.end(), sep, endl); }

ll russian(ll a, ll k, ll m)
{
	ll res = 0;
	while (k)
	{
		if (k & 1LL)
			res = (res + a) % m;
		a = (a + a) % m;
		k >>= 1LL;
	}
	return res;
}

ll fastpow(ll a, ll k, ll m)
{
	ll res = 1;
	while (k)
	{
		if (k & 1LL)
			res = (res * a) % m;
		a = (a * a) % m;
		k >>= 1LL;
	}
	return res;
}

ll slowpow(ll a, ll k, ll m)
{
	ll res = 1;
	while (k)
	{
		if (k & 1LL)
			res = russian(res, a, m);
		a = russian(a, a, m);
		k >>= 1LL;
	}
	return res;
}

ll _gcd(ll a, ll b)
{
	while (b)
		swap(a %= b, b);
	return a;
}

ll _lcm(ll a, ll b)
{
	return a / _gcd(a, b) * b;
}

ll extgcd(ll a, ll b, ll& k, ll& l)
{
	if (b == 0)
	{
		k = 1; l = 0;
		return a;
	}
	ll res = extgcd(a, a % b, l, k);
	l -= a / b * k;
	return res;
}

ll _inv(ll a, ll p)
{
	return fastpow(a, p - 2, p);
}