Added Codechef Contest Problems #19

October 2024/Codechef Contest Problems/chefAndParole.c++

@@ -0,0 +1,19 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+  int X;
+  cin >> X;
+
+  if (X >= 7)
+  {
+    cout << "Yes" << endl;
+  }
+  else
+  {
+    cout << "No" << endl;
+  }
+
+  return 0;
+}

October 2024/Codechef Contest Problems/gcd.c++

@@ -0,0 +1,82 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+bool isPrime(int n)
+{
+  // Since 0 and 1 is not prime
+  // return false.
+  if (n == 1 || n == 0)
+    return false;
+
+  // Run a loop from 2 to
+  // square root of n.
+  for (int i = 2; i * i <= n; i++)
+  {
+    // If the number is divisible by i,
+    // then n is not a prime number.
+    if (n % i == 0)
+      return false;
+  }
+
+  // Otherwise n is a prime number.
+  return true;
+}
+
+vector<int> firstnp(int n)
+{
+  int limit = max(15, static_cast<int>(n * log(n) + n * log(log(n))));
+  vector<bool> isp(limit + 1, true);
+  isp[0] = isp[1] = false;
+  for (int p = 2; p * p <= limit; p++)
+  {
+    if (isp[p])
+    {
+      for (int m = p * p; m <= limit; m += p)
+      {
+        isp[m] = false;
+      }
+    }
+  }
+
+  vector<int> primes;
+  for (int p = 2; primes.size() < n && p <= limit; p++)
+  {
+    if (isp[p])
+      primes.push_back(p);
+  }
+  return primes;
+}
+
+int main()
+{
+  int t;
+  cin >> t;
+  while (t--)
+  {
+    int n, m;
+    cin >> n >> m;
+    int a[n][m];
+    vector<int> v = firstnp(m * n);
+    int count = 0;
+    // sieve_of_eratosthenes(v);
+
+    count = 0;
+    for (int i = 0; i < n; i++)
+    {
+      for (int j = 0; j < m; j++)
+      {
+        a[i][j] = v[count];
+        count++;
+      }
+    }
+
+    for (int i = 0; i < n; i++)
+    {
+      for (int j = 0; j < m; j++)
+      {
+        cout << a[i][j] << " ";
+      }
+      cout << endl;
+    }
+  }
+}

October 2024/Codechef Contest Problems/rectangled.c++

@@ -0,0 +1,28 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+  // your code goes here
+  int T;
+  cin >> T;
+  while (T > 0)
+  {
+    T--;
+    int n;
+    int l = 0, b = 0;
+    cin >> n;
+    for (int i = 1; i < n; i++)
+    {
+      for (int j = 1; j < n; j++)
+      {
+        if ((i * j > l * b) && 2 * (i + j) <= n)
+        {
+          l = i;
+          b = j;
+        }
+      }
+    }
+    cout << l * b << endl;
+  }
+}