Crne

#include<bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
using ii=long long;
int main()
{
    int n;
    cin >> n;
    
    
    // 2, 4, 6, 9, 12, 16, 21, 
    //2*1 2*2    3*3 4*3 4*4 5*4 5*5
    
    
    int r = 0;
    for (int x = 0; x <= 100; ++x){
        for (int y = 0; y <= 100; ++y) {
            if (y + x - 2 == n) {
                r = max(r, y * x);
            }
        }
    }
    cout << r << "\n";
    
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED