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c_cpp
a year ago
206 B
1
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#include <iostream>
using namespace std;

int main() {

	int a;
	cin >> a;
	if ((a / 1000) - (a % 10) == (((a / 100) % 10) + (a / 10) % 10)) {
		cout << "YES";
	}
	else {
		cout << "NO";
	}

}