[AtCoder]ABC 104A – Rated for Me ~ 106[C++]

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int r;
    cin >> r;

  if (r < 1200) {
    cout << "ABC" << endl;
  }else if (r < 2800){
    cout << "ARC" << endl;
  }else {
    cout << "AGC " << endl;
  } 
}

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n, k;
  cin >> n >> k;

  if (n % k == 0) {
    cout << "0" << endl;
  }else {
    cout << "1" << endl;
  } 
}

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a, b;
  cin >> a >> b;

  int road = a + b - 1;

  cout << a * b - road << endl;
}