Untitled
#include <iostream> using namespace std; int main() { int n; cin >> n; int Digit1 = n / 1000; int Digit2 = (n / 100) % 10; int Digit3 = (n / 10) % 10; int Digit4 = n % 10; if (Digit1 - Digit4 == Digit2 + Digit3) { cout << "YES"; } else { cout << "NO"; } return 0; }