Create Missing_Number.cpp

Mukulguptaiit · Dec 28, 2024 · 9281ca0 · 9281ca0
1 parent edc3e7c
commit 9281ca0
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/Missing_Number.cpp b/Missing_Number.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+    unsigned long long int t;
+    cin >> t;
+    unsigned long long int sum=t*(t+1)/2;
+    unsigned long long int i=0;
+    t--;
+    while (t--) {
+        cin>>i;
+        sum-=i;
+    }
+    cout<<sum;
+    return 0;
+}