int main() { int a, b, sum; cin >> a >> b; sum = a + b; int gw, sw, bw; gw = sum % 10; sum = sum / 10; sw = sum % 10; sum = sum / 10; bw = sum; if (a + b > 100 && gw == bw) { cout << "Yes"; } else if (a + b >= 10 && a + b <= 99 && gw == sw) { cout << "Yes"; } else if (a + b >= 1 && a + b <= 9) { cout << "Yes"; } else cout << "No"; return 0; }