Update FlipCards.cpp

program/CPP/FlipCards.cpp

@@ -1,29 +1,38 @@
-//Flip the cards
-/* Simple solution to flip the cards Code Chef problem
-https://www.codechef.com/submit/FLIPCARDS
-*/
 #include <iostream>
 using namespace std;
 
+/*
+Problem: Flip the Cards (CodeChef - FLIPCARDS)
+-----------------------------------------------
+There are N cards, X of them face up and (N - X) face down.
+In one operation, you can flip all cards — turning face up cards face down and vice versa.
+You want all cards to face the same side (all up or all down).
+
+We need the minimum number of cards to flip manually.
+
+Logic:
+- If X == 0 or X == N → already same side → output 0
+- If X <= N/2 → better to flip X face-up cards
+- Otherwise → better to flip (N - X) face-down cards
+*/
+
 int main() {
-
-	int t,n,x;
-	cin>>t;
-	if(t>=1 && t<=5000)
-	{  for(int i=0;i<t;i++)
-	    {
-	        cin>>n>>x;
-	       if(n>=2 && n<=100 && x>=0 && x<=n)
-	       {
-	        if(x==0 || x==n)
-	          cout<<0<<endl;
-	         else if(x<=n/2)
-	           cout<<x<<endl;
-	         else
-	           cout<<n-x<<endl;
-	        }
-	    }
-
-	}
-	return 0;
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int t;
+    cin >> t;
+
+    while (t--) {
+        int n, x;
+        cin >> n >> x;
+
+        // Validate constraints (optional for CodeChef)
+        if (n < 2 || n > 100 || x < 0 || x > n) continue;
+
+        int result = min(x, n - x); // minimal flips required
+        cout << result << "\n";
+    }
+
+    return 0;
 }