#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using llu = long long unsigned;

vector<ll> dx = { 0, 0, -1, 1};
vector<ll> dy = {-1, 1,  0, 0};

#define MOD 1000000007
int main() {
    int S, T;
    char c;
    cin >> S >> T >> c;

    string ret = "NO";
    switch(c) {
        case '<':
            if (S<T) { ret = "YES"; }
            break;
        case '>':
            if (S>T) { ret = "YES"; }
            break;
        case '=':
            if (S==T) { ret = "YES"; }
            break;
    }
    cout << ret << endl;
    return 0;
}