B2037Odd and Even Number Judgment

#include <iostream> using namespace std; int main(){int a; cin >> a;if(a % 2 == 0){ cout << "even"; }else { cout << "odd"; }return 0;}

B2045Jingjing’s Appointment

#include <iostream> using namespace std; int main() { int a; cin >> a; if (a == 1) { cout << "NO"; } else if (a == 3) { cout << "NO"; } else if (a == 5) { cout << "NO"; } else { cout << "YES"; } return 0;}

B2040Check if it is a Two-Digit Number

#include <iostream> using namespace std; int main() { int num; cin >> num; if (num >= 10 && num <= 99) { cout << 1; } else { cout << 0; } return 0;}