Welcome to the Editorial of IPC junior-1 (2025–26).

A. Choco-Coco

Author:Aditya_Dave,  202401457,  billu_1903

Math, Implementation

include <bits/stdc++.h>
using namespace std;
int main() {  ios::sync_with_stdio(false);  cin.tie(nullptr);
int t; cin >> t;
while (t--) {
    int n; cin >> n;
    vector&lt;int&gt; a(n);
    long long sum = 0;
    for (int &x : a) cin >> x, sum += x;

    if (sum % n == 0) {
        cout << "YES\n";
        continue;
    }

    long long rem = sum % (n - 1);
    bool ok = false;
    for (int x : a)
        if (x % (n - 1) == rem)
            ok = true;

    cout << (ok ? "YES\n" : "NO\n");
}
} 

B. Fruit Dish

Author:Krish_M

include <bits/stdc++.h>
using namespace std; int main() {  ios::sync_with_stdio(false);  cin.tie(nullptr);  // your code }